Rise of a pleasant aroma (6)
I believe the answer is:
ascent
'rise' is the definition.
(synonyms)
'a pleasant aroma' is the wordplay.
'pleasant aroma' becomes 'scent'.
'a'+'scent'='ASCENT'
'of' acts as a link.
(Other definitions for ascent that I've seen before include "Alpine expedition" , "made by Hilary and Tenzing" , "Going up" , "A climb or way up" , "Mountain path" .)