Satirist (9)
I believe the answer is:
lampooner
'satirist' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lampooner that I've seen before include "Paler moon for one who indulges in personal satire" , "Parodist" , "One given to ridicule" , "One setting off squib" , "Satirist" .)