Art is performed in part of flight (5)
I believe the answer is:
stair
'part of flight' is the definition.
(as in a flight of stairs)
'art is performed' is the wordplay.
'performed' is an anagram indicator.
'art'+'is'='artis'
'artis' with letters rearranged gives 'STAIR'.
'in' is the link.
(Other definitions for stair that I've seen before include "One step of a flight" , "one's seen in flight" , "One step in a series" , "this could get one down" , "One of a flight of steps" .)