Insightful comment (6)
I believe the answer is:
apercu
'insightful comment' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for apercu that I've seen before include "9 [WHATS THE POINT]" , "Brief sketch, outline" , "brief explanation" , "Glimpse" , "summary, insight; race up (anag.)" .)