Homes apt to be given makeover on air (10)
I believe the answer is:
atmosphere
'air' is the definition.
('atmosphere' can be a synonym of 'air')
'homes apt to be given makeover on' is the wordplay.
'to be given' says to put letters next to each other.
'makeover' indicates anagramming the letters (I've seen this in other clues).
'on' becomes 're' ('on' can be mean 'with reference to'**).
'homes'+'apt'='homesapt'
'homesapt' is an anagram of 'atmosphe'.
'atmosphe'+'re'='ATMOSPHERE'
(Other definitions for atmosphere that I've seen before include "Gas surrounding a planet" , "Surrounding ambience" , "Feel" , "prevailing mood" , "Air" .)