Miss Piggy, to Miss Piggy (3)
I believe the answer is:
moi
'miss piggy to miss piggy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for moi that I've seen before include "Just me, monsieur" , "Me (facetiously)" , "Me - in France" , "You surely don't mean me?" , "egoist" .)