In middle of playing recorder, copper appeared again (10)

I believe the answer is:

reoccurred

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'in middle of playing recorder copper appeared again' is the definition.
I can't tell whether this defines the answer.

'in middle of playing recorder copper' is the wordplay.
'in middle of' indicates putting letters inside.
'playing' is an anagram indicator.
'copper' becomes 'Cu' (chemical symbol).
'recorder' is an anagram of 'reocrred'.
'reocrred' going around 'cu' is 'REOCCURRED'.

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I've seen this clue in The Times.

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