Broadcast advice to send fewer telegrams (8)
I believe the answer is:
wireless
This clue could be a double definition.
'broadcast advice' is the first definition.
'wireless' can be an answer for 'broadcast' (thesaurus). I am not certain of the 'advice' bit.
'send fewer telegrams' is the second definition.
'wireless' can be an answer for 'send' (thesaurus). I am not sure about the 'fewer telegrams' bit.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for wireless that I've seen before include "25 across" , "Early name for radio" , "Receiver" , "Old name for radio - lacks something" , "Set" .)