Possibly let Adrian nap before dinner (12)

I believe the answer is:

anteprandial

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'before dinner' is the definition.
I can't judge whether this defines the answer.

'possibly let adrian nap' is the wordplay.
'possibly' indicates an anagram.
'let'+'adrian'+'nap'='letadriannap'
'letadriannap' is an anagram of 'ANTEPRANDIAL'.

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I've seen this clue in The Independent.

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