Flavouring fanatic joins woman (6)
I believe the answer is:
nutmeg
'flavouring' is the definition.
(I know that nutmeg is a type of spice)
'fanatic joins woman' is the wordplay.
'fanatic' becomes 'nut' (I've seen this before).
'joins' is a charade indicator (letters next to each other).
'woman' becomes 'meg' ().
'nut'+'meg'='NUTMEG'
(Other definitions for nutmeg that I've seen before include "Fragrant seed of tropical tree grated as spice" , "Aromatic seed - met gnu (anag)" , "Aromatic seed - tropical tree" , "Aromatic spicy kernel" , "Give out light" .)