Parodist performing in Palermo resort (9)
I believe the answer is:
lampooner
'parodist' is the definition.
('lampooner' can be a synonym of 'parodist')
'performing in palermo resort' is the wordplay.
'performing' becomes 'on' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'resort' indicates anagramming the letters.
'palermo' anagrammed gives 'lampoer'.
'on' placed inside 'lampoer' is 'LAMPOONER'.
(Other definitions for lampooner that I've seen before include "Satirist" , "Paler moon for one who indulges in personal satire" , "One setting off squib" , "Parodist" , "One given to ridicule" .)