Piece of grass (5)
I believe the answer is:
blade
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">piece of grass</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 blade that I've seen before include "A knife, or a dashing fellow" , "London rail terminus" , "Runner on an ice-skate" , "Leaf, of grass, say" , "Flat part of an oar" .)