Crossword Genius

Ale isn't better for protein (7)

Ross

I believe the answer is:

elastin

'protein' is the definition.
(elastin is a kind of protein)

'ale isn't better' is the wordplay.
'better' is an anagram indicator (with an improved letter-order).
'ale'+'isnt'='aleisnt'
'aleisnt' is an anagram of 'ELASTIN'.

'for' acts as a link.

(Another definition for elastin that I've seen is " protein".)

I've seen this clue in The Daily Express.
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