Network device doesn't start — it's far from gold (5)
I believe the answer is:
outer
'it's far from gold' is the definition.
(the outer ring on a target is far from the gold)
'network device doesn't start' is the wordplay.
'network device' becomes 'router' (device in a computer network).
'doesn't start' means to remove the first letter.
'router' with its initial letter taken away is 'OUTER'.
(Other definitions for outer that I've seen before include "External kind of route" , "Surrounding" , "External; part of archery target" , "On the periphery" , "Objective" .)