Spice Girl follows fan (6)
I believe the answer is:
nutmeg
'spice' is the definition.
(nutmeg is a kind of spice)
'girl follows fan' is the wordplay.
'girl' becomes 'meg' ().
'follows' says to put letters next to each other.
'fan' becomes 'nut' (both can mean an enthusiast).
'meg' put after 'nut' is 'NUTMEG'.
(Other definitions for nutmeg that I've seen before include "Fragrant tropical seed ground as spice" , "Hard seed of tropical tree used as spice" , "Hard seed of tropical tree grated for spice" , "Fragrant seed of tropical tree grated as spice" , "it's used by bakers" .)