Ape or parrot (7)
I believe the answer is:
imitate
I believe this clue is a double definition.
'ape' is the first definition.
(I know that ape is a kind of mock)
'parrot' is the second definition.
(to parrot is to copy or imitate)
(Other definitions for imitate that I've seen before include "'Ape, copy (7)'" , "Parrot" , "I tame it (anag)" , "Copy someone" , "Follow suit" .)