Sour deviant trolls you and me (9)
I believe the answer is:
ourselves
'you and me' is the definition.
(I've seen this before)
'sour deviant trolls' is the wordplay.
'deviant' indicates anagramming the letters.
'trolls' becomes 'elves' (both are magical creatures).
'sour' anagrammed gives 'ours'.
'ours'+'elves'='OURSELVES'
(Other definitions for ourselves that I've seen before include "We or us personally" , "Us, reflexively" , "See 16" , "Emphatically us" .)