Optimistic to boost copper circuit? (6)
I believe the answer is:
upbeat
'optimistic' is the definition.
(similar in meaning)
'boost copper circuit?' is the wordplay.
'boost copper' becomes 'up' (I am not sure about this - if you are sure you should believe this answer much more).
'circuit?' becomes 'beat' ('beat' can be a synonym of 'circuit').
'up'+'beat'='UPBEAT'
'to' is the link.
Can you help me to learn more?
(Other definitions for upbeat that I've seen before include "Optimistic, positive" , "Cheerful and encouraging, like lively music" , "Optimistic (colloq.)" , "Heartening" , "Relentlessly optimistic" .)