Fa's follower (3)
I believe the answer is:
sol
'fa's follower' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sol that I've seen before include "Note; Peruvian currency" , "The sun in Spain" , "Peruvian currency; Roman sun god" , "Personification of the sun" , "Mexican lager" .)