Crossword Genius

Relating to heat (7)

Ross

I think it could be either:

thermal

caloric

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">relating to heat</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 thermal that I've seen before include "Warming" , "which can take a glider up" , "Her malt became heat-related" , "Warm or hot - underwear?" , "Up-current of air" .)

I've seen this clue in The Guardian, The Sun, The Times, the Penny Press, The Mirror, the Sydney Morning Herald and The Daily Mail.
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