Hairgrip made of copper with reverse catch (5,3)

'hairgrip' is the definition.
(I know that hairgrip can be written as bobby pin)

'of copper with reverse catch' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is present in the answer.
'copper' could be 'p' and 'p' is present in the answer.
'with' could be 'by' (both can mean close together) and 'by' is located in the answer.
This explanation may well be incorrect...

'made' is the link.

Can you help me to learn more?