Fed tripe, I could become terror-stricken (9)
I believe the answer is:
petrified
'terror-stricken' is the definition.
(thesaurus)
'fed tripe i could become' is the wordplay.
'could become' indicates anagramming the letters.
'fed'+'tripe'+'i'='fedtripei'
'fedtripei' is an anagram of 'PETRIFIED'.
(Other definitions for petrified that I've seen before include "Frightened" , "terror-stricken" , "Turned to stone - in extreme fear" , "Paralysed with fear" , "scared stiff" .)