The 69-year-old publicist from Surrey was held at 7.40am this morning (December 6) by officers as part of Operation Yewtree, though they confirmed that he is being interviewed for offences that do not directly relate to Savile.
A police statement read: "Officers working on Operation Yewtree have this morning, Thursday 6 December, arrested a man in his 60s [Yewtree 6] in connection with the investigation.
"The man from Surrey was arrested at 07:40hrs on suspicion of sexual offences and has been taken into a central London police station."
It continued: "The individual falls under the strand of the investigation we have termed 'Others'. We are not prepared to discuss further."
The investigation sparked by revelations of Savile's abuse come under three sections: abuse committed by Savile alone; abuse committed by Savile along with others; and others committing abuse.
Clifford is the sixth person to be questioned as part of Operation Yewtree, after an unnamed man in his 80s was held last week.
Gary Glitter, Freddie Starr, Dave Lee Travis and ex-TV producer Wilfred De'Ath are believed to be the other four individuals quizzed as part of the investigations.
The Savile abuse scandal and consequent controversy over a Panorama documentary being pulled from the BBC's schedule last year eventually led to the departure of BBC director general George Entwistle.