Given a shiner, show resentment (6)
I believe the answer is:
glower
'resentment' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'given a shiner show' is the wordplay.
I cannot really understand how this works, but
'show' could be 'er' (US medical drama) and 'er' is found within the answer.
The remaining letters 'glow' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for glower that I've seen before include "Stare angrily, scowl" , "Angry/sullen look" , "Glare" , "Not a good look" , "Look black" .)