As worn with an air, perhaps, by a leader of style? (4)
I believe the answer is:
sari
'as worn with an' is the definition.
I can't judge whether this definition defines the answer.
'air perhaps by a leader of style?' is the wordplay.
'perhaps' indicates anagramming the letters.
'by' is a charade indicator (letters next to each other).
'a leader of' says to take the initial letters.
The first letter of 'style' is 's'.
'air' with letters rearranged gives 'ari'.
'ari' put after 's' is 'SARI'.
Can you help me to learn more?
(Other definitions for sari that I've seen before include "Eastern garment" , "Indian costume" , "Traditional dress of Hindu women" , "South Asian garment (variant spelling)" , "Something worn" .)