Deliveries by comedian go too far (9)
I believe the answer is:
overshoot
'go too far' is the definition.
(to overshoot is to go past)
'deliveries by comedian' is the wordplay.
'deliveries' becomes 'overs' (cricket term).
'by' is a charade indicator (letters next to each other).
'comedian' becomes 'hoot' (both can mean a funny person).
'overs'+'hoot'='OVERSHOOT'
(Other definitions for overshoot that I've seen before include "fail to stop where intended" , "Go past the mark" , "Go past unintentionally" , "Go beyond the intended target" , "Go too far" .)