Regular user of a fan? (6)
I believe the answer is:
addict
This clue might be a double definition.
'regular user' is the first definition.
'addict' can be an answer for 'user' (I've seen this before). I am not certain of the 'regular' bit.
'a fan?' is the second definition.
(I have seen 'Devoted fan' mean 'addict' so perhaps 'fan' could also mean 'addict')
'of' acts as a link.
Can you help me to learn more?
(Other definitions for addict that I've seen before include "One who's hooked" , "Slave to a habit" , "Bricklayer's tool" , "Junkie, dependant" , "Person compulsively given to taking drugs" .)