Networking system using alien trap to snare female (8)
I believe the answer is:
ethernet
'networking system' is the definition.
(computer network)
'alien trap to snare female' is the wordplay.
'alien' becomes 'et' (extra terrestrial).
'trap' becomes 'net' (net is a kind of trap).
'to snare' indicates putting letters inside (inserted letters are trapped or snared).
'female' becomes 'her' (I've seen this before).
'et'+'net'='etnet'
'etnet' placed around 'her' is 'ETHERNET'.
'using' acts as a link.
(Other definitions for ethernet that I've seen before include "Network of a number of computers" , "Communication system" , "food" , "comms system" , "Local area computer network" .)