Brand fronted by fashionable old actress (7)
I believe the answer is:
hepburn
'fashionable old actress' is the definition.
'hepburn' can be an answer for 'actress' (I've seen this before). I'm unsure of the 'fashionable old' bit.
'brand fronted by' is the wordplay.
'brand' becomes 'burn' (brand can mean to burn a mark into something).
'fronted' becomes 'hep' (I can't explain this - if you can you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'burn' after 'hep' is 'HEPBURN'.
Can you help me to learn more?
(Other definitions for hepburn that I've seen before include "See 9" , "Audrey --, film actress" , "Audrey and Katherine, film stars" , "Audrey and Katharine, film stars" , "Katharine -, US actress" .)