Balls headed by Spice Girl's head put balls between legs (9)
I believe the answer is:
nutmegged
'balls between legs' is the definition.
I can't judge whether this defines the answer.
'balls headed by spice girl's head' is the wordplay.
'balls' becomes 'ed' (I've seen this in other clues).
'headed by' is a charade indicator (letters next to each other).
'spice' becomes 'nutmeg' (nutmeg is a kind of spice).
'girl's head' becomes 'g' (I can't justify this - if you can you should give a lot more credence to this answer).
'nutmeg'+'g'='nutmegg'
'ed' after 'nutmegg' is 'NUTMEGGED'.
'put' acts as a link.
Can you help me to learn more?
(Other definitions for nutmegged that I've seen before include "embarrassed by passes?" , "hit between the legs" .)