Insight from copper in a team (6)
I believe the answer is:
acumen
'insight' is the definition.
(I've seen this in another clue)
'copper in a team' is the wordplay.
'copper' becomes 'cu' (chemical symbol).
'in' means one lot of letters goes inside another.
'team' becomes 'men' (group of people).
'a'+'men'='amen'
'cu' placed inside 'amen' is 'ACUMEN'.
'from' is the link.
(Other definitions for acumen that I've seen before include "ability to make good judgements" , "Shrewdness, sharpness of mind" , "Forming judgement" , "Mental sharpness as in business" , "'Keenness, depth of perception (6)'" .)