Flowering bulb (5)
I believe the answer is:
tulip
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flowering bulb</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 tulip that I've seen before include "Dutch bulb?" , "Bulbous plant" , "Plant, it's name shares an origin with turban" , "Plant of the lily family with a single showy flower" , "Popular garden flower from Amsterdam?" .)