Crossword Genius

Pig-headed associate, but not unfriendly (5)

Ross

I believe the answer is:

pally

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'not unfriendly' is the definition.
I can't judge whether this defines the answer.

'pig-headed associate' is the wordplay.
'pig-headed' becomes 'p' (start (head) of the word pig).
'associate' becomes 'ally' (ally is a kind of associate).
'p'+'ally'='PALLY'

'but' acts as a link.

Can you help me to learn more?

(Other definitions for pally that I've seen before include "Intimate" , "On friendly terms" , "China may be so" , "Very familiar" , "Chummy" .)

I've seen this clue in the Evening Standard.
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