Loose-fitting jacket (7)
I believe the answer is:
blouson
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">loose-fitting jacket</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for blouson that I've seen before include "Short full jacket gathered in at waist" , "Loose jacket" , "Loose-fitting jacket" , "Garment" .)