Mates brought back put up with custard-pie comedy? (9)
I believe the answer is:
slapstick
'custard-pie comedy?' is the definition.
(slapstick comedy)
'mates brought back put up' is the wordplay.
'mates' becomes 'pals' (I've seen this in another clue).
'brought back' is a reversal indicator.
'put up' becomes 'stick' (as in sticking something up).
'pals' in reverse letter order is 'slap'.
'slap'+'stick'='SLAPSTICK'
'with' is the link.
(Other definitions for slapstick that I've seen before include "Unsubtle comedy" , "Boisterous comedy based on actions rather than words" , "Knockabout comedy based on action rather than words" , "Comedy with physical antics" , "That's laughable" .)