Italian inventor has brandy on island (7)
I believe the answer is:
marconi
'italian inventor' is the definition.
'marconi' can be an answer for 'inventor' (I've seen this before). I'm not sure about the 'italian' bit.
'brandy on island' is the wordplay.
'brandy' becomes 'marc' (marc is a kind of brandy).
'island' becomes 'i'.
'marc'+'on'+'i'='MARCONI'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for marconi that I've seen before include "Inventor of radio-telegraphy" , "Pioneer of radio communication from Minorca" , "Italian physicist" , "Italian inventor of radio" , "Communications pioneer" .)