Aunt mimics arrangement of coins (10)

I believe the answer is:

numismatic

'of coins' is the definition.
(I've seen this in another clue)

'aunt mimics arrangement' is the wordplay.
'arrangement' indicates an anagram.
'aunt'+'mimics'='auntmimics'
'auntmimics' anagrammed gives 'NUMISMATIC'.

I've seen this clue in The Daily Express.

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