Knots (5)
I believe the answer is:
nodes
'knots' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nodes that I've seen before include "Knots" , "Small knob-like swellings" , "Swellings or knotty masses" , "Network intersections" , "Bumps or lumps" .)