Many of the other members of the gang have already been stripped of their ill-gotten gains but Leader is disputing the origins of £34,728 paid into his accounts.
He told Exeter Crown Court there are innocent explanations for large cash payments into his accounts including sales of food at market stalls in Essex and rent from three houses he and his wife own in East London.
Leader also says he received an income from importing and selling adult DVDs and running the White's Brasserie Gentleman's Club in Aldgate.
An attempt to strip Plymouth drug dealer Stephen Proctor of his assets has been dropped after it was found he had nothing left to recover.
Leader, from Chingford, Essex, and Proctor,41, of Ashford Road, Plymouth, were both jailed for nine years for their part in the plot in 2011.
Leader is now due for release next month because of time spent on remand before his conviction. He returned to Exeter Crown Court to resist an application under the Proceeds of Crime Act (POCA).
Lee Bremridge, prosecuting, said some of Leader's explanations about the source of his income have been accepted but £34.728 are still in dispute and are thought to come from drug dealing.
Under POCA the defendant has to prove that money and assets were earned legitimately, or the Judge has a duty to order confiscation.
Leader said he ran a variety of businesses including market stalls and a company called World Wide ventures which imported and exported all sorts of goods including adult DVDs.
He said:"The film part of the company imported with adult films and I had deals with the producers. I bought them from the Netherlands.
"I had one business called Direct Adult Video and another I called DBS which stood for Dirty Book Shop distribution. I was also involved with the White's Brasserie, which is a gentleman's club in Aldgate in London, which I was managing under contract."
He told Judge Phillip Wassall that references in his computer records to the purchase and sale of Christmas Cake referred to out of date confectionary rather than anything more sinister.
Leader appeared in custody, having been sentenced at Exeter in 2011 alongside other members of a multi-million pound gang who were rounded up in a police surveillance operation codenamed Stagshaw.
He was arrested on the M5 near Cullompton because his BMW had no insurance and was flagged up by a numberplate recognition camera.
Police found £125,000 of cocaine he was transporting to Plymouth and tracked gang leaders Timothy Eastgate and Paul Flisher from contacts in his phone.
The gang made at least £3.3 million and spent it on luxury houses, cars, boats and designer clothes with its two leaders modeling themselves on James Bond.
Eastgate and Flisher posed in the back of limousines as they toasted their ill-gotten wealth with champagne and used mobile phones which ended in the number 007.
They had guns at their homes and shared the ownership of a speedboat named Shaken not Stirred which they kept on the Costa del Sol.
Files retrieved from the gang's computer showed sales of at least £3.3 million worth of cocaine and Eastgate had an airport style X ray machine at his estate in Wymondham, Norfolk, to check if the drug packages would be detected.
He had a handgun with silencer and ammunition hidden in his freezer and Flisher was caught on his own CCTV brandishing a sawnoff shotgun later found at his home.
Eastgate had a mansion in Norfolk which he bought from a Premiership footballer and he boasted of his close contacts in the pop and entertainment world.
He had a private box in the O2 arena in London where he and other gang members mingled with some of the star performers.
The gang were jailed for a total of more than 90 years in 2011 with
Eastgate, from Norfolk, and Flisher, from Essex, receiving 23 and 21
years.