Paid out (5)
'paid out' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for spent that I've seen before include "Exhausted, having paid money?" , "Worn out - after shopping?" , "Drained of energy - or paid out" , "Used up; exhausted" , "Worn Out, exhausted" .)
'paid out' is the definition.
('disburse' can be a synonym of 'pay out')
This is the entire clue.
(Another definition for disbursed that I've seen is " Paid out".)