Feel bitter about attending without power (6)
I believe the answer is:
resent
'feel bitter' is the definition.
(I've seen this before)
'about attending without power' is the wordplay.
I cannot really see how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is located in the answer.
The remaining letters 'sent' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for resent that I've seen before include "Take something as an affront" , "given another posting?" , "Don't like" , "Feel bitter or envious" , "Consider as an injury or affront" .)