Confused waiter goes into fill order by military (4,2,4)
I believe the answer is:
fire at will
'order by military' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'confused waiter goes into fill' is the wordplay.
'confused' is an anagram indicator.
'goes into' indicates putting letters inside.
'waiter' anagrammed gives 'reatwi'.
'reatwi' going into 'fill' is 'FIRE AT WILL'.
Can you help me to learn more?
(Another definition for fire at will that I've seen is " Infantry command, usually after volleys".)