Perhaps saw advantage withdrawing money (4,4)
I believe the answer is:
edge tool
'perhaps saw' is the definition.
(a saw is an example)
'advantage withdrawing money' is the wordplay.
'advantage' becomes 'edge' (edge is a kind of advantage).
'withdrawing' says the letters should be written in reverse.
'money' becomes 'loot' (loot is a kind of money).
'loot' in reverse letter order is 'tool'.
'edge'+'tool'='EDGE TOOL'
(Other definitions for edge tool that I've seen before include "Knife or axe, for example" , "Maybe saw" , "Implement with one or more cutting sides" , "Chisel or knife, say" .)