Resign and go as ordered, causing hostility (10)
I believe the answer is:
aggression
'hostility' is the definition.
(I've seen this before)
'resign and go as ordered' is the wordplay.
'and' means one lot of letters go next to another.
'ordered' is an anagram indicator.
'resign'+'go'+'as'='resigngoas'
'resigngoas' anagrammed gives 'AGGRESSION'.
'causing' acts as a link.
(Other definitions for aggression that I've seen before include "warlike attitude" , "Hostile action" , "Unprovoked attack" , "Act of hostility" , "Use of armed force" .)