Rushlike plant (5)
I believe the answer is:
sedge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rushlike plant</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 sedge that I've seen before include "Coarse grassy plant" , "Plant like grass" , "fly by rivers" , "Bog plant; type of warbler" , "water-loving vegetation" .)