Dress style she flouted for working outside hospital (3,3,8)
I believe the answer is:
off the shoulder
'dress style' is the definition.
(off-the-shoulder is a type of dress)
'she flouted for working outside hospital' is the wordplay.
'working' indicates anagramming the letters.
'outside' is an insertion indicator.
'hospital' becomes 'h' (abbreviation for hospital on maps).
'she'+'flouted'+'for'='shefloutedfor'
'shefloutedfor' is an anagram of 'offthesoulder'.
'offthesoulder' enclosing 'h' is 'OFF-THE-SHOULDER'.
(Another definition for off the shoulder that I've seen is " Like a style of garment".)