Feeling guilty (7)
I believe the answer is:
ashamed
'feeling guilty' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ashamed that I've seen before include "Contrite or embrassed" , "Embarrassed and Contrite" , "Chagrined" , "Feeling bad, having done something wrong" , "'Embarrassed, guilty (7)'" .)