Filmed host running (4)
I believe the answer is:
shot
'filmed' is the definition.
('shoot' can be a synonym of 'film')
'host running' is the wordplay.
'running' is an anagram indicator (the letters run around to different places).
'host' anagrammed gives 'SHOT'.
(Other definitions for shot that I've seen before include "Woven in different colours; attempt to score" , "Gunned down - go - guess" , "Fired or filmed" , "[FILM]" , "Small drink; photo" .)