Makes a lasting impression with gags needing no introduction (6)
I believe the answer is:
etches
'makes a lasting impression' is the definition.
(I've seen this in another clue)
'gags needing no introduction' is the wordplay.
'gags' becomes 'retches' (I've seen this before).
'needing no introduction' means to remove the first letter.
'retches' with its first letter taken off is 'ETCHES'.
'with' acts as a link.
(Other definitions for etches that I've seen before include "Engraves" , "Impresses deeply as into metal plate" .)