Order nothing for this soldier (8)
I believe the answer is:
commando
'this soldier' is the definition.
(I've seen this before)
'order nothing' is the wordplay.
'order' becomes 'command' (commanding is a kind of ordering).
'nothing' becomes 'O' (looks like zero - 0).
'command'+'o'='COMMANDO'
'for' is the link.
(Other definitions for commando that I've seen before include "Green Beret" , "Amphibious military unit" , "Army unit" , "Soldier trained to carry out dangerous raids" , "Royal Marine Corps soldier" .)