Pad and copper ring used in climb (7)

I believe the answer is:

cushion

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'pad' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for cushion that I've seen before include "Pad on sofa" , "Pad; part of billiards table" , "Edge of billiard table" , "Buffer" , "Soften (the effect of an impact)" .)

I've seen this clue in The Sun and The Telegraph.

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