Runs business importing Italy’s foremost electronic device (5)
I believe the answer is:
radio
'electronic device' is the definition.
'radio' can be an answer for 'device' (thesaurus). I am not sure about the 'electronic' bit.
'runs business importing italy's foremost' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'business' becomes 'ado' (both can mean happenings or commotion).
'importing' is an insertion indicator.
'foremost' says to take the initial letters.
The initial letter of 'italys' is 'i'.
'ado' enclosing 'i' is 'adio'.
'r'+'adio'='RADIO'
Can you help me to learn more?
(Other definitions for radio that I've seen before include "Receiving set" , "Contact" , "It was first called the wireless" , "Electronic receiver" , "Sound receiver" .)