Point in a network (4)
I believe the answer is:
node
'point in a network' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for node that I've seen before include "Slight swelling on a plant where new leaves emerge" , "Point in network where lines intersect or branch" , "Lump at junction" , "Done to a small lump" , "Burl" .)