Set method of communication (5)
I believe the answer is:
radio
This might be a double definition.
'set method' is the first definition.
'radio' can be an answer for 'set' (set can mean a radio set). I'm unsure of the 'method' bit.
'communication' is the second definition.
(radio is a kind of communication)
'of' acts as a link.
Can you help me to learn more?
(Other definitions for radio that I've seen before include "Communications device" , "Speech receiver" , "Electronic receiver" , "Marconi invented it" , "listening device" .)