Multiple choices revealed repetition (4)
I believe the answer is:
echo
'repetition' is the definition.
(I know that echo is a type of imitation)
'multiple choices revealed' is the wordplay.
'revealed' says the answer is hidden in the clue (I've seen 'revealing' mean this).
'ECHO' is hidden within 'multiple choices'.
(Other definitions for echo that I've seen before include "Audio effect" , "Languishing nymph" , "Be suggestive of" , "Parrot" , "one catches on the rebound?" .)