Daughter of King Lear (5)
I believe the answer is:
regan
'daughter of king lear' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for regan that I've seen before include "better half of Cornwall" , "Fawning daughter" , "Possessed gir" , "Work team" , "Goneril's sister (K. Lear)" .)