Goneril's dad (4)
I believe the answer is:
lear
'goneril's dad' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lear that I've seen before include "Role at Stratford" , "Lesson" , "Tragic Shakespearean king" , "Tragic king in play" , "Shakespeare's tragic king (4)" .)