One member goes to the pictures to communicate (6)
I believe the answer is:
'communicate' is the definition.
(impart can mean to communicate or pass on)
'one member goes to the pictures' is the wordplay.
'one' becomes 'i' (Roman numeral).
'member' becomes 'MP' (Member of Parliament).
'goes to' is a charade indicator (letters next to each other).
'the pictures' becomes 'art'.
'to' acts as a link.
(Other definitions for impart that I've seen before include "Communicate (info)" , "Armpit (anag)" , "Divulge, pass on" , "Share, pass on" , "Make known, relate" .)