These cut some grass (6)
I believe the answer is:
blades
'some grass' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for blades that I've seen before include "cutters" , "They cut" , "Football club nickname" , "Cutting parts of knives" , "Metal runners on skates" .)