Brought up a new perfume in early stages of development (7)
I believe the answer is:
nascent
'early stages of development' is the definition.
I can't judge whether this definition defines the answer.
'brought up a new perfume' is the wordplay.
'brought up' says the letters should be written in reverse (in a down clue, letters go up).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'perfume' becomes 'scent' (synonyms).
'a'+'n'='an'
'an' in reverse letter order is 'na'.
'na'+'scent'='NASCENT'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for nascent that I've seen before include "Emerging, in the process of being born" , "just coming into effect" , "Developing" , "Beginning to develop, embryonic" , "in early stages" .)