Communication by road, perhaps, around India (5)
I believe the answer is:
radio
'communication' is the definition.
(radio is a kind of communication)
'road perhaps around india' is the wordplay.
'perhaps' indicates anagramming the letters.
'around' indicates putting letters inside.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'road' with letters rearranged gives 'rado'.
'rado' enclosing 'i' is 'RADIO'.
'by' acts as a link.
(Other definitions for radio that I've seen before include "Communications medium" , "Marconi invented it" , "broadcasting station" , "Electronic receiver" , "Communications receiver" .)