Stomach is turned finding pervert (9)
I believe the answer is:
masochist
'pervert' is the definition.
(masochist is a kind of pervert)
'stomach is turned' is the wordplay.
'turned' indicates anagramming the letters.
'stomach'+'is'='stomachis'
'stomachis' with letters rearranged gives 'MASOCHIST'.
'finding' is the link.
(Other definitions for masochist that I've seen before include "deviant"" , "one enjoying humiliation" , "One who likes pain" .)