Furrows (4)
I believe the answer is:
ruts
'furrows' is the definition.
('rut' can be a synonym of 'furrow')
This is the entire clue.
(Other definitions for ruts that I've seen before include "Ditches" , "Deep furrows" , "Deep tracks in path" , "Furrows not to get stuck in" , "gets ready for new partner" .)