Spice fanatic sending over excellent specimen (6)
I believe the answer is:
nutmeg
'spice' is the definition.
(nutmeg is a kind of spice)
'fanatic sending over excellent specimen' is the wordplay.
'fanatic' becomes 'nut' (I've seen this before).
'sending over' says the letters should be written backwards.
'excellent specimen' becomes 'gem'.
'gem' backwards is 'meg'.
'nut'+'meg'='NUTMEG'
(Other definitions for nutmeg that I've seen before include "Asian tree whose aromatic seed is used as spice when grated or ground" , "Men gut this herb badly" , "(In soccer) kick the ball between an opponent's legs" , "Aromatic seasoning" , "Kick the football between an opponent's legs" .)