Radio network starts to win immediate favourable impression (4)
I believe the answer is:
wifi
'radio network' is the definition.
'wifi' can be an answer for 'network' (I've seen this before). I am not certain of the 'radio' bit.
'starts to win immediate favourable impression' is the wordplay.
'starts to' says to take the initial letters.
The initial letters of 'win immediate favourable impression' is 'WIFI'.
Can you help me to learn more?
(Other definitions for wifi that I've seen before include "method of transmission" , "internet access" , "Local area network that uses high frequency radio signals to transmit and receive" .)