Carter of "Gimme a Break!” (4)
I believe the answer is:
nell
'carter of gimme a break' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nell that I've seen before include "Orphan girl" , "Dickensian heroine" , "- - Gwynne" , "First name of Charles II's ex-actress mistress" , "-- Gwyn, 17th-century actress" .)