Fashion Dior et al made to measure (8)
I believe the answer is:
tailored
'made to measure' is the definition.
(I've seen this before)
'fashion dior et al' is the wordplay.
'fashion' indicates an anagram.
'dior'+'et'+'al'='dioretal'
'dioretal' is an anagram of 'TAILORED'.
(Other definitions for tailored that I've seen before include "Made garments, suits perhaps" , "Simple in line or design, suit perhaps" , "Fitted, well-cut" , "Adjusted" , "Fitted to requirements" .)