In favour of the movement for upgrading (9)
I believe the answer is:
promotion
'upgrading' is the definition.
(I've seen this before)
'in favour of the movement' is the wordplay.
'in favour of' becomes 'pro' (I've seen this before).
'the movement' becomes 'motion' ('motion' can be a synonym of 'movement').
'pro'+'motion'='PROMOTION'
'for' is the link.
(Other definitions for promotion that I've seen before include "Puffing, perhaps" , "that should result in more money" , "sales campaign" , "Publicity campaign" , "Step up" .)