Fruit drink made from powder, without a head (7)
I believe the answer is:
coconut
'fruit' is the definition.
(I know that coconut is a fruit)
'without a head' is the wordplay.
'without' becomes 'coco' (I can't justify this - if you can you should give a lot more credence to this answer).
'a head' becomes 'nut' (informal term for somebody's head).
'coco'+'nut'='COCONUT'
'drink made from powder' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for coconut that I've seen before include "Shy target?" , "source of oil" , "Shy occupier" , "Large palm fruit" , "Large hard seed" .)