Crossword Genius

Copper can intervene (5)

Ross

I believe the answer is:

cutin

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'copper can intervene' is the definition.
I can't judge whether this definition defines the answer.

'copper can' is the wordplay.
'copper' becomes 'Cu' (Cu is the chemical symbol for copper).
'can' becomes 'tin' (both are metal containers).
'cu'+'tin'='CUTIN'

Can you help me to learn more?

(Another definition for cutin that I've seen is " waxy material in plant".)

I've seen this clue in The Irish Times.
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