Order for weapons now (7,4)
I believe the answer is:
present arms
'order' is the definition.
(I've seen this before)
'weapons now' is the wordplay.
I cannot quite see how this works, but
'weapons' could be 'arms' ('arm' can be a synonym of 'weapon') and 'arms' is found in the answer.
'now' could be 'present' (the present time) and 'present' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for present arms that I've seen before include "Raise a weapon in salute" , "order needed" , "Hold rifle vertically as a salute" , "offer to restore Venus de Milo?" , "Military drill command" .)