Saffron (6)
I believe the answer is:
crocus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">saffron</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 crocus that I've seen before include "Bloomer" , "Spring plant" , "Occurs (anag.)" , "Occurs (anagram)" , "'Spring flower, source of saffron (6)'" .)