Creation of Croatian garment (8)
I believe the answer is:
raincoat
'garment' is the definition.
(raincoat is a kind of garment)
'creation of croatian' is the wordplay.
'creation of' is an anagram indicator (I've seen this in other clues).
'croatian' is an anagram of 'RAINCOAT'.
(Other definitions for raincoat that I've seen before include "which should keep water out" , "Waterproof outer garment" , "protection against the elements" , "Mac" , "Protective garment for Croatian" .)