Refusing to move, nine starting to budge (12)
I believe the answer is:
intransigent
'refusing to move' is the definition.
'nine starting to budge' is the wordplay.
'to budge' indicates anagramming the letters.
'nine'+'starting'='ninestarting'
'ninestarting' with letters rearranged gives 'INTRANSIGENT'.
(Other definitions for intransigent that I've seen before include "unwilling to compromise" , "Obstinate" , "Unlikely to budge" , "Irreconcilable" , "becomes immovable" .)