Not quite shut (4)
I believe the answer is:
ajar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not quite shut</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ajar that I've seen before include "Raja (anag.)" , "Barely open" , "Not quite shut" , "Not quite closed" , "partly opened" .)