Channel, furrow (6)
I believe the answer is:
groove
I believe this clue is a double definition.
'channel' is the first definition.
(I know that channel can be written as groove)
'furrow' is the second definition.
(I know that furrow can be written as groove)
(Other definitions for groove that I've seen before include "have the best time" , "Cutting" , "Long narrow cut or depression" , "Long narrow depression - dance and/or play popular music" , "Spiral track followed by a gramophone needle" .)