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As the labourers see it, excellent head on pint of stout (5)

Ross

I believe the answer is:

plump

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'stout' is the definition.
(thesaurus)

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(Other definitions for plump that I've seen before include "Not obese, just pleasantly rounded" , "Having a full rounded shape" , "stout" , "Fat - set down unceremoniously" , "Buxom, chubby" .)

I've seen this clue in the Irish Times.
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