New Tory campaign he's filming (14)
I believe the answer is:
cinematography
'filming' is the definition.
(synonyms)
'new tory campaign he's' is the wordplay.
'new' indicates anagramming the letters.
'tory'+'campaign'+'he'='torycampaignhe'
'torycampaignhe' anagrammed gives 'CINEMATOGRAPHY'.
(Other definitions for cinematography that I've seen before include "Art of film-making" , "Art of 26 [MOVING PICTURES]" , "film unit's work" .)