Poor taste finale could cause resentment (6)
I believe the answer is:
offend
'cause resentment' is the definition.
(I've seen this in another clue)
'poor taste finale' is the wordplay.
I cannot quite understand how this works, but
'poor' could be 'off' (both can mean low quality) and 'off' is found in the answer.
'finale' could be 'end' (the end of a story or show) and 'end' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'could' is the link.
Can you help me to learn more?
(Other definitions for offend that I've seen before include "Cause displeasure or hurt, be nasty towards" , "Break the rules" , "Upset - break the law" , "disgust" , "Affront - break the law" .)