They change colors (5)
I believe the answer is:
dyers
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">they change colors</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dyers that I've seen before include "Colour-changers" , "Stainers of cloth" , "14 [SWANUPPING] company" .)