Carriage set up or dismantled (7)
I believe the answer is:
posture
'carriage' is the definition.
('posture' can be a synonym of 'carriage')
'set up or dismantled' is the wordplay.
'dismantled' is an anagram indicator.
'set'+'up'+'or'='setupor'
'setupor' anagrammed gives 'POSTURE'.
(Other definitions for posture that I've seen before include "Bodily stance" , "The way a person stands or sits" , "Pose or position" , "Body position" , "Bodily position" .)