From the East, an aroma is emerging (7)
I believe the answer is:
nascent
'is emerging' is the definition.
('nascent' can be a synonym of 'emerging')
'from the east an aroma' is the wordplay.
'from the east' shows that the letters should be reversed in order.
'aroma' becomes 'scent' ('scent' can be a synonym of 'aroma').
'an' in reverse letter order is 'na'.
'na'+'scent'='NASCENT'
(Other definitions for nascent that I've seen before include "coming into circulation?" , "Coming alive" , "Dawning" , "awakening" , "Beginning to develop, embryonic" .)