Order to relax (2,4)
I believe the answer is:
at ease
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">order to relax</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for at ease that I've seen before include "with no worries" , "Relax - that's an army order" , "Army command to relax, stand with feet apart" , "Military order to relax from attention" , "Relaxing - that's a military order" .)