Ginger nuts for ducks (8)
I believe the answer is:
redheads
'ducks' is the definition.
(redhead is a kind of duck)
'ginger nuts' is the wordplay.
'ginger' becomes 'redhead' (both can mean someone with red hair).
'nuts' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'redhead'+'s'='REDHEADS'
'for' is the link.
Can you help me to learn more?
(Other definitions for redheads that I've seen before include "ginger group" , "ducks" .)