High light? (3)
I believe the answer is:
sun
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">high light?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sun that I've seen before include "Dawn riser" , "Star around which the earth travels" , "It's sol in Latin" , "Our central star" , "Source of daylight" .)