Director and judge can't stand (8)
I believe the answer is:
execrate
'can't stand' is the definition.
(to execrate someone is to not stand them)
'director and judge' is the wordplay.
'director' becomes 'exec'.
'and' means one lot of letters go next to another.
'judge' becomes 'rate' (rating is a kind of judging).
'exec'+'rate'='EXECRATE'
(Other definitions for execrate that I've seen before include "Deplore and detest" , "Curse" , "Denounce or detract" , "Loudly disapprove" , "Utter curses with erect axe" .)