Reddish purple (7)
I believe the answer is:
magenta
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">reddish purple</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for magenta that I've seen before include "Purplish-pink colour" , "Reddish purple" , "Colour named after a bloody 1859 battle in Italy" , "Light purplish-red" , "Reddish-purple colour" .)