The reflection of Madame Cholet (4)
I believe the answer is:
echo
'the reflection' is the definition.
(echo is a kind of reflection)
'of madame cholet' is the wordplay.
'of' says the answer is hidden in the clue.
'ECHO' can be found hidden inside 'madame cholet'.
(Other definitions for echo that I've seen before include "Audio effect" , "Nymph whose love Narcissus spurned" , "Let's hear it again for the Greek nymph who loved Narcissus in vain" , "Nymph; E (radio comms.)" , "Close imitation" .)