Type of heel made from copper bar (5)
I believe the answer is:
cuban
'type of heel' is the definition.
'copper bar' is the wordplay.
'copper' becomes 'Cu' (Cu is the chemical symbol for copper).
'bar' becomes 'ban' (bar can mean to ban or prohibit).
'cu'+'ban'='CUBAN'
'made from' is the link.
(Other definitions for cuban that I've seen before include "Citizen of Castro's country" , "Havana native" , "Caribbean" , "Relating to Castro's isle" , "sort of heel" .)