Very hot day (8)
I believe the answer is:
scorcher
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">very hot day</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 scorcher that I've seen before include "Very hot day; remarkable thing" , "for example, really fine" , "Brand, perhaps" , "burner" , "Day of very hot and sunny weather" .)