A new entrant in local network (8)
I believe the answer is:
intranet
'a new entrant' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'in local network' is the wordplay.
'local' becomes 'tra' (I can't justify this - if you can you should believe this answer much more).
'network' becomes 'net' (synonyms).
'in'+'tra'+'net'='INTRANET'
Can you help me to learn more?
(Other definitions for intranet that I've seen before include "linked office computers" , "Local computer network" , "Private comms system" , "Private comms network" , "Website with restricted access" .)