Mimic initially riles copper giving summary (6)
I believe the answer is:
apercu
'summary' is the definition.
(I know that apercu is a type of abstract)
'mimic initially riles copper' is the wordplay.
'mimic' becomes 'ape' (ape can mean to copy or imitate).
'initially' suggests taking the first letters.
'copper' becomes 'Cu' (Cu is the chemical symbol for copper).
The initial letter of 'riles' is 'r'.
'ape'+'r'+'cu'='APERCU'
'giving' is the link.
(Other definitions for apercu that I've seen before include "Illuminating or entertaining point (from French)" , "Glimpse" , "summary, insight; race up (anag.)" , "Short synopsis, precis" , "insightful comment" .)