Copper base raised to a higher power (5)
I believe the answer is:
cubed
'raised to a higher power' is the definition.
I can't tell whether this defines the answer.
'copper base' is the wordplay.
'copper' becomes 'cu' (chemical symbol).
'base' becomes 'bed' (bed is a kind of base).
'cu'+'bed'='CUBED'
Can you help me to learn more?
(Other definitions for cubed that I've seen before include "Divided up" , "(Of number) multiplied by its own square" , "Like some sugar" , "One is so unchanging" , "To the power of three" .)