Crossword Genius

Player with puffy cheeks (5)

Ross

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'player' is the definition.
(piper is a kind of player)

I cannot understand how the rest of the clue works.

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(Other definitions for piper that I've seen before include "Military musician" , "Highland instrumentalist" , "'Liam O'Flynn or Seamus Ennis, say (5)'" , "Musician (paid for a tune?)" , "Wind instrumentalist" .)

I've seen this clue in the Evening Standard.
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