The 74-year-old singer has kept a low profile since he was questioned over a claim that he abused a 15-year-old boy at a Billy Graham religious event in 1985, reported Daily Mirror.
Dressed in a T-shirt and jeans, a relaxed Cliff spent a week at The Parlour recording studios in Nashville, Tennessee, recording his 101st album.
Cliff has also announced a tour next year to celebrate his 75th birthday.
The 'Young Ones' singer has been staying at his holiday home on the Algarve in Portugal after voluntarily being quizzed by detectives.