Fashionable, unusually neat covering for the leg (7)
I believe the answer is:
elegant
'fashionable' is the definition.
(thesaurus)
'unusually neat covering for the leg' is the wordplay.
'unusually' is an anagram indicator.
'covering for' is an insertion indicator.
'neat' with letters rearranged gives 'eant'.
'eant' enclosing 'leg' is 'ELEGANT'.
(Other definitions for elegant that I've seen before include "Fine" , "Modish" , "Chic; smart" , "Tasteful and refined in appearance" , "Stylish in appearance, a gentle kind" .)