Attire's designed for public performer (7)
I believe the answer is:
artiste
'public performer' is the definition.
(I've seen this before)
'attire's designed' is the wordplay.
'designed' indicates anagramming the letters (designed with the letters).
'attires' is an anagram of 'ARTISTE'.
'for' acts as a link.
(Other definitions for artiste that I've seen before include "Professional performer" , "Person playing" , "Attires for professional entertainer" , "Entertainer, singer or dancer" , "Theatre performer" .)