Distinctive air of gold sun god (4)
I believe the answer is:
aura
'distinctive air' is the definition.
(I've seen this before)
'gold sun god' is the wordplay.
'gold' becomes 'au' (Au is the chemical symbol for gold).
'sun god' becomes 'ra' (Egyptian god).
'au'+'ra'='AURA'
'of' is the link.
(Other definitions for aura that I've seen before include "Intangible something around a person" , "Glorious glow" , "Distinctive atmosphere surrounding person or thing" , "Intangible essence emanating from a person" , "Nimbus" .)