Temporary accommodation frowned on by 3 affected hearing, vision (8)
I believe the answer is:
campsite
'temporary accommodation' is the definition.
(place where people stay temporarily)
'affected hearing vision' is the wordplay.
'affected' becomes 'camp' (camp can mean exaggerated or affected).
'hearing' shows a homophone (sound like).
'vision' becomes 'sight' (synonyms).
'sight' sounds like 'site'.
'camp'+'site'='CAMPSITE'
'frowned on by 3' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for campsite that I've seen before include "Location for pitching tents" , "for temporary accommodation" , "Ground for tents" .)