No trouble at all (4)
I believe the answer is:
ease
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">no trouble at all</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 ease that I've seen before include "Poise or leisure" , "Alleviate" , "soldier may be at it" , "Leisure, relaxation" , "Comfort and repose" .)