Sorry deception lacking originality (8)
I believe the answer is:
contrite
'sorry' is the definition.
('contrite' can be a synonym of 'sorry')
'deception lacking originality' is the wordplay.
'deception' becomes 'con' (I've seen this before).
'lacking originality' becomes 'trite' (I've seen this before).
'con'+'trite'='CONTRITE'
(Other definitions for contrite that I've seen before include "Repentant about nice trot" , "Feeling remorse" , "guilt-ridden" , "Regretful" , "Wholly penitent" .)