Clifford is accused of assaulting the girl at his offices in London between October 1981 and May 1982.
The former celebrity publicist indicated he would plead not guilty. He will now appear at Southwark Crown Court on 4 August.
In November, Clifford’s appeal to have his jail term cut was rejected
when the Court of Appeal ruled that the original sentence was justified.
Clifford was first arrested in December 2012 as part of the Operation Yewtree inquiry.
He was famed for representing celebrities including Simon Cowell, Jade Goody, former prostitute Pamela Bordes and comedian Freddie Starr.