Remedy that holds out for fashion design (7)
I believe the answer is:
couture
'fashion design' is the definition.
'couture' can be an answer for 'fashion' (I've seen this before). I'm not certain of the 'design' bit.
'remedy that holds out' is the wordplay.
'remedy' becomes 'cure' (synonyms).
'that holds' indicates putting letters inside.
'cure' placed around 'out' is 'COUTURE'.
'for' is the link.
Can you help me to learn more?
(Other definitions for couture that I've seen before include "Design and manufacture of clothing" , "Dress designing" , "High-fashion dressmaking" , "High fashion design" .)