Network connection (4)
I believe the answer is:
node
'network connection' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for node that I've seen before include "Intersection in a network" , "Point of branching in a network" , "Point at which several lines come together" , "Point of intersection" , "Point in network where lines intersect or branch" .)