Purist contrived to make trouble (4,2)
I believe the answer is:
stir up
'trouble' is the definition.
(thesaurus)
'purist contrived' is the wordplay.
'contrived' indicates anagramming the letters.
'purist' with letters rearranged gives 'STIR UP'.
'to make' acts as a link.
(Other definitions for stir up that I've seen before include "Foment (trouble)" , "Instigate" , "Incite; mix" , "Get excited" , "Excite - incite" .)