Crowd turning on poet in blitz (7)
I believe the answer is:
bombard
'blitz' is the definition.
(thesaurus)
'crowd turning on poet' is the wordplay.
'crowd' becomes 'mob' (mob can mean a crowd of people).
'turning' says the letters should be written backwards.
'on' is a charade indicator (letters next to each other).
'poet' becomes 'bard' (bard is a kind of poet).
'mob' written backwards gives 'bom'.
'bom'+'bard'='BOMBARD'
'in' acts as a link.
(Other definitions for bombard that I've seen before include "Organ stop" , "Pelt with missiles" , "Attack with missiles" , "not working? Keep hitting" , "Batter heavily and persistently" .)