Compliant, seeing nothing crooked about finish (8)
I believe the answer is:
obedient
'compliant' is the definition.
('obedient' can be similar in meaning to 'compliant')
'nothing crooked about finish' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'crooked' becomes 'bent' ('bent' can be similar in meaning to 'crooked').
'about' is an insertion indicator.
'finish' becomes 'die'.
'bent' going around 'die' is 'bedient'.
'o'+'bedient'='OBEDIENT'
'seeing' is the link.
(Other definitions for obedient that I've seen before include "Complying with commands" , "Deferential" , "Submissive, compliant" , "A good dog should be" , "Doing as one's told" .)