Cherry-red colour (6)
I believe the answer is:
cerise
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">cherry</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">red colour</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for cerise that I've seen before include "Reddish-pink colour" , "Light purplish red" , "Deep red colour" , "Shade of red" , "Light clear red" .)