Gets seat rearranged in scenery (5,3)
I believe the answer is:
stage set
'scenery' is the definition.
(I've seen this in another clue)
'gets seat rearranged' is the wordplay.
'rearranged' indicates an anagram.
'gets'+'seat'='getsseat'
'getsseat' is an anagram of 'STAGE SET'.
'in' acts as a link.
(Other definitions for stage set that I've seen before include "Theatre scenery etc" , "play ready to start" , "Scenery and furniture" , "dramatic backdrop" .)