Suspicious about head on northerner's beer that has been diluted (6)
I believe the answer is:
shandy
'beer that has been diluted' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'suspicious about head on northerner's' is the wordplay.
'suspicious' becomes 'shady' (synonyms).
'about' is an insertion indicator.
'head on' suggests taking the first letters.
The initial letter of 'northerners' is 'n'.
'shady' enclosing 'n' is 'SHANDY'.
Can you help me to learn more?
(Other definitions for shandy that I've seen before include "Beer/lemonade drink" , "Lemonade-beer drink" , "Drink made of beer and lemonade" , "Beer/lemonade mixture" , "Light beer" .)