Drill directive (2,4)
I believe the answer is:
at ease
'drill directive' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for at ease that I've seen before include "Relaxing - that's a military order" , "Army command to relax, stand with feet apart" , "Free from anxiety" , "'Relaxed (2,4)'" , "with no worries" .)