Repeat business for a vintage classic designer (4)
I believe the answer is:
coco
'a vintage classic designer' is the definition.
I can't judge whether this definition defines the answer.
'repeat business' is the wordplay.
'repeat' indicates the doubling of some letters.
'business' becomes 'co' (short for company).
'co' doubled is 'COCO'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for coco that I've seen before include "Famous clown" , "'... the Clown, ... Chanel (4)'" , "Gabrielle Bonheur Chanel" , "address for Chanel" , "French fashion designer, who branched into perfume etc" .)