Helpful hint (3)
I believe the answer is:
tip
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">helpful hint</span>' is the definition.<br/ ><span class="explanation-format__explanation">(piece of advice)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tip that I've seen before include "Gratuity; hint" , "Pointed end" , "Reward service; end" , "tiny reward" , "Gratuity or light touch" .)