Arouse hostility against one deviously (10)
I believe the answer is:
antagonise
'arouse hostility' is the definition.
(to antagonise is to annoy or provoke hostility)
'against one deviously' is the wordplay.
'deviously' is an anagram indicator (I've seen this in other clues).
'against'+'one'='againstone'
'againstone' with letters rearranged gives 'ANTAGONISE'.
(Other definitions for antagonise that I've seen before include "Create hostility" , "Make an enemy of" , "anger" , "Bug" , "Arouse hostility" .)