Support for proposal to meeting (9)
I believe the answer is:
promotion
'support' is the definition.
(thesaurus)
'for proposal to meeting' is the wordplay.
'for' becomes 'pro' (as in being 'pro' something).
'proposal' becomes 'motion' (proposal at a meeting).
'to meeting' is a charade indicator (letters next to each other).
'pro'+'motion'='PROMOTION'
(Other definitions for promotion that I've seen before include "sales campaign" , "Advertising campaign" , "movement?" , "Puffing, perhaps" , "Step up" .)