Slight tint (5)
I believe the answer is:
tinge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slight tint</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 tinge that I've seen before include "Touch (of colour?)" , "Hint; shade" , "Suffuse" , "Slight but perceptible amount" , "A smack" .)