Redhead gets money for biscuit (11)
I believe the answer is:
gingerbread
'biscuit' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'redhead gets money' is the wordplay.
'redhead' becomes 'ginger' (I've seen this in another clue).
'gets' is a charade indicator (letters next to each other).
'money' becomes 'bread' (slang term for money).
'ginger'+'bread'='GINGERBREAD'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for gingerbread that I've seen before include "Type of biscuit, often human shaped" , "Cake - for single parents?" , "Cheap and tawdry - type of cake" , "Cake made with treacle or syrup" , "Spiced cake made with treacle" .)