Suitor or fan (7)
I believe the answer is:
admirer
I believe this clue is a double definition.
'suitor' is the first definition.
(I've seen this before)
'fan' is the second definition.
(an admirer is a fan of something)
(Other definitions for admirer that I've seen before include "Hopeful lover?" , "Fan or devotee" , "A young lady's beau - he thinks she's great" , "Supporter or suitor" , "Married (anag) -- lover" .)