Depend on accepting copper's answer (5)

I believe the answer is:

'answer' is the definition.
('reply' can be a synonym of 'answer')

'depend on accepting copper's' is the wordplay.
'depend on' becomes 'rely' (I've seen this before).
'accepting' is an insertion indicator.
'copper' becomes 'p' (**).
'rely' placed around 'p' is 'REPLY'.

(Other definitions for reply that I've seen before include "counterattack?" , "Comeback" , "Answer, respond" , "Reciprocate" , "Returned statement" .)

I've seen this clue in The Telegraph.

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