Stir up, provoke (6)
I believe the answer is:
incite
This clue is a double definition.
'stir up' is the first definition.
(I know that stir up can be written as incite)
'provoke' is the second definition.
(I know that incite is a more specific form of provoke)
(Other definitions for incite that I've seen before include "Foment or arouse" , "Encourage, urge" , "Provoke to action" , "Whip up" , "Encourage (to violence)" .)