A peasant’s muddy feet (9)
I believe the answer is:
'feet' is the definition.
(anapaest is a kind of foot)
'a peasant's muddy' is the wordplay.
'muddy' indicates anagramming the letters (letters get muddied or confused).
'peasants' anagrammed gives 'napaests'.
I've seen this clue in The Sunday Times.
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