Plant around the edges? (5)
I believe the answer is:
sedge
'plant' is the definition.
(sedge is a plant)
'around the edges?' is the wordplay.
'around' is an anagram indicator.
'edges' anagrammed gives 'SEDGE'.
(Other definitions for sedge that I've seen before include "Plant of wet ground" , "water-loving vegetation" , "plant with triangular stems" , "Grasslike marsh plant" , "Marsh-dweller" .)