Bit of hope? (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bit of hope?</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 ray that I've seen before include "Shaft of light" , "A bright beam or flat fish" , "Column of light on the fish?" , "Beam of light or flat fish" , "may be electric" .)