Can be eaten quietly at leisure (5)

I believe the answer is:

pease

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'can be eaten' is the definition.
I can't tell whether this defines the answer.

'quietly at leisure' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'at' says to put letters next to each other.
'leisure' becomes 'ease' (I've seen this before**).
'p'+'ease'='PEASE'

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I've seen this clue in the Evening Standard.

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