Woman backed fashionable drink (6)
I believe the answer is:
nicola
'woman' is the definition.
'backed fashionable drink' is the wordplay.
'backed' says the letters should be written in reverse.
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'drink' becomes 'cola' (I've seen this before**).
'in' reversed gives 'ni'.
'ni'+'cola'='NICOLA'
(Other definitions for nicola that I've seen before include "Girl's name" , "Girl" .)