Grass-like plant (5)
I believe the answer is:
sedge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grass-like plant</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 sedge that I've seen before include "water-loving vegetation" , "Marsh grass" , "Bog plant; type of warbler" , "Herons" , "Wetland grass-like plant" .)