Wintour of fashion (4)
I believe the answer is:
anna
'wintour of fashion' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for anna that I've seen before include "The name's the same,either way" , "She's a woman, whichever way you look at it" , "Dame -- Neagle" , "Former one sixteenth of Rupee" , "Massey, Sewell or Karenina" .)