Crossword Genius

DIY product recommended to stuff parrot? (9)

Ross

I believe the answer is:

polyfilla

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'diy product' is the definition.
(product that might be used when doing DIY)

'recommended to stuff parrot?' is the wordplay.
I cannot quite understand how this works, but
'stuff' could be 'fill' (fill is a kind of stuff) and 'fill' is located in the answer.
This explanation may well be incorrect...

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I've seen this clue in The Guardian.
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