An Italian is unable to see this window screen (8,5)
I believe the answer is:
venetian blind
'window screen' is the definition.
(I've seen this before)
'an italian is unable to see' is the wordplay.
'an italian' becomes 'Venetian' (Venetian is an example).
'is unable to see' becomes 'blind' (I've seen this before).
'venetian'+'blind'='VENETIAN BLIND'
'this' is the link.
(Other definitions for venetian blind that I've seen before include "This keeps the sun" , "been used in dark room?" , "Window shade with movable slats" , "Sun screen" , "Window screen" .)