Listener followed Newton around the corner (4)
I believe the answer is:
near
'around the corner' is the definition.
(I've seen this in another clue)
'listener followed newton' is the wordplay.
'listener' becomes 'ear' (body part which hears or listens).
'followed' is a charade indicator (letters next to each other) (some letters go after others).
'newton' becomes 'N' (symbol for the scientific unit of force).
'ear' put after 'n' is 'NEAR'.
(Other definitions for near that I've seen before include "Easy to reach - hard to touch!" , "Close at hand" , "Miserly and proximate" , "Approaching" , "Parsimonious (informal)" .)