Home entertainment can be said to have vision (5)
I believe the answer is:
telly
'home entertainment can' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'said to have vision' is the wordplay.
'said' becomes 't' (I've seen this in other clues).
'to have vision' becomes 'elly' (I can't justify this - if you can you should give a lot more credence to this answer).
't'+'elly'='TELLY'
'be' is the link.
Can you help me to learn more?
(Other definitions for telly that I've seen before include "The goggle-box" , "- - Savalas" , "One of the media" , "TV (colloq.)" , "cop in seventies" .)