Remorseful, apologetic (8)
I believe the answer is:
contrite
I believe this is a double definition.
'remorseful' is the first definition.
(synonyms)
'apologetic' is the second definition.
(similar in meaning)
(Other definitions for contrite that I've seen before include "Wholly penitent" , "Repentant about nice trot" , "guilt-ridden" , "Sorry for something done" , "Suffering remorse" .)