Most of the money available for move (5)
I believe the answer is:
budge
'available for move' is the definition.
'budge' can be an answer for 'move' (to budge is to move slightly). I am not certain of the 'available for' bit.
'most of the money' is the wordplay.
'most of' means to remove the last letter.
'the money' becomes 'budget' (budget is a kind of money).
'budget' with its final letter taken off is 'BUDGE'.
Can you help me to learn more?
(Other definitions for budge that I've seen before include "Pompous" , "Make a slight movement" , "Move however slightly" , "Cause to alter an opinion or stance, shift" , "Move reluctantly" .)