Possibly airs gown (4)
I believe the answer is:
sari
'gown' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'possibly airs' is the wordplay.
'possibly' indicates an anagram.
'airs' with letters rearranged gives 'SARI'.
Can you help me to learn more?
(Other definitions for sari that I've seen before include "Traditional dress of Indian women" , "Traditional Indian women's dress" , "Something worn" , "South Asian garment (variant spelling)" , "Asian dress" .)