Lie beside (4)
I believe the answer is:
abut
'lie beside' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for abut that I've seen before include "Adjoin, border" , "Adjoin at one end" , "End or lean against, say a building" , "Touch upon" , "Cease (from activity)" .)