Flavouring enthusiast joins woman (6)
I believe the answer is:
nutmeg
'flavouring' is the definition.
(nutmeg is a kind of flavouring)
'enthusiast joins woman' is the wordplay.
'enthusiast' becomes 'nut' (I've seen this before).
'joins' means one lot of letters go next to another.
'woman' becomes 'meg' (**).
'nut'+'meg'='NUTMEG'
(Other definitions for nutmeg that I've seen before include "Hard fruit and girl for a spice" , "Give out light" , "Hard, aromatic spice" , "Hard aromatic seed" , "Men gut this herb badly" .)