Gloomy atmosphere (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gloomy atmosphere</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pall that I've seen before include "Cloth to cover a coffin" , "Become tiresome" , "Cloth spread over a coffin" , "Weary" , "wear off" .)