Out West, a supporter will be very flattering (4)
I believe the answer is:
fawn
'be very flattering' is the definition.
'out west a supporter will' is the wordplay.
I cannot quite see how this works, but
'west' could be 'w' (synonyms) and 'w' is found within the answer.
'a' could be 'an' and 'an' is present in the leftover letters.
A single letter 'f' remains which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fawn that I've seen before include "Be obsequious, grovel" , "Cringe" , "Try to win favour by being obsequious" , "Be servile" , "Ingratiate oneself" .)