Paul Gambaccini was released on bail after being arrested on suspicion of sexual offences by officers investigating Operation Yewtree.
A police spokesman refused to confirm the identity of the arrested man, but said:
The man was arrested at an address in south London on suspicion of sexual offences and taken into police custody.
He falls under the strand of the investigation we have termed 'others'.
Police confirmed that another man, aged 74, was also arrested as part of the investigation. Oficers said both have been bailed to a date in early January pending further inquiries