Dress is fine in open air, being fashionable (8)
I believe the answer is:
pinafore
'dress' is the definition.
(I know that pinafore is a type of dress)
'fine in open air being fashionable' is the wordplay.
'fine' becomes 'f' (abbreviation).
'in' is an insertion indicator.
'being fashionable' indicates an anagram (letters can be fashioned into something else).
'open'+'air'='openair'
'openair' anagrammed gives 'pinaore'.
'f' going inside 'pinaore' is 'PINAFORE'.
'is' is the link.
(Other definitions for pinafore that I've seen before include "Sleeveless dress or apron" , "Protective kitchen wear" , "Musical craft" , "Protective gear" , "Stagecraft, say" .)