Cuts some weeds (5)
I believe the answer is:
docks
I believe this is a double definition.
'cuts' is the first definition.
(docking is a kind of cutting)
'weeds' is the second definition.
(I've seen this before)
'some' acts as a link.
(Other definitions for docks that I've seen before include "Trims (tail); arrives in port" , "Harbours" , "Cuts short, curtails" , "Cuts short - coarse weeds" , "Broadleaved weeds" .)