Polish fan (4)
I believe the answer is:
buff
I believe this clue is a double definition.
'polish' is the first definition.
(buffing is a kind of polishing)
'fan' is the second definition.
(synonyms)
(Other definitions for buff that I've seen before include "Dull brownish-yellow - expert" , "Blow" , "Yellowish brown" , "Yellowish-beige; expert" , "Informal enthusiast - polish him" .)