Brief amusing comment about one imitating copper (6)
I believe the answer is:
apercu
'brief amusing comment' is the definition.
'apercu' can be an answer for 'comment' (I've seen this before). I am unsure of the 'brief amusing' bit.
'about one imitating copper' is the wordplay.
'about' becomes 'a' (abbreviation in Chambers).
'one imitating' becomes 'per' (I can't explain this - if you can you should give a lot more credence to this answer).
'copper' becomes 'Cu' (Cu is the chemical symbol for copper).
'a'+'per'+'cu'='APERCU'
Can you help me to learn more?
(Other definitions for apercu that I've seen before include "Precis, brief outline" , "Brief sketch, outline" , "Illuminating comment or brief reference, to the French" , "9 [WHATS THE POINT]" , "Short synopsis, precis" .)