Does one agree with Nick? (8)
I believe the answer is:
satanist
'nick?' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I can't see?
'does one agree' is the wordplay.
I cannot really see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'with' acts as a link.
Can you help me to learn more?
(Other definitions for satanist that I've seen before include "One who worships the devil" , "Saint sat with devil worshipper" , "diabolical fellow" , "A follower of the devil" , "Devil devotee" .)