Hint at (5)
I believe the answer is:
imply
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hint at</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for imply that I've seen before include "Indicate indirectly" , "Mean" , "Hint, suggest" , "Insinuate or suggest" , "Infer" .)