Tormented in San Diego appallingly (8)
I believe the answer is:
agonised
'tormented' is the definition.
(I've seen this before)
'san diego appallingly' is the wordplay.
'appallingly' is an anagram indicator (I've seen this in other clues).
'san'+'diego'='sandiego'
'sandiego' anagrammed gives 'AGONISED'.
'in' acts as a link.
(Other definitions for agonised that I've seen before include "San Diego (anagram)" , "Worried greatly" , "Suffered mental anguish" , "experienced pain" , "worried a lot" .)