Affectionate; heat (4)
I believe the answer is:
warm
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">affectionate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">heat</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(to warm something up is to heat it)</span><br/ ><br/ ></span>
(Other definitions for warm that I've seen before include "Cordial" , "Animated" , "Moderately hot" , "Lively" , "Near to finding hidden object" .)