Stylish and smart British actress (7)
I believe the answer is:
hepburn
'british actress' is the definition.
'hepburn' can be an answer for 'actress' (I've seen this before). I'm not sure about the 'british' bit.
'stylish and smart' is the wordplay.
'stylish' becomes 'hep' (I can't justify this - if you can you should believe this answer much more).
'and' is a charade indicator (letters next to each other).
'smart' becomes 'burn' (burning is a kind of smarting).
'hep'+'burn'='HEPBURN'
Can you help me to learn more?
(Other definitions for hepburn that I've seen before include "Audrey and Katharine, film stars" , "Audrey -; Katharine -, film actresses" , "Katharine -, US actress" , "Audrey --, film actress" , "Actress Katharine or Audrey" .)