Model in kimono is revealing back (7)
I believe the answer is:
version
'model' is the definition.
(I've seen this before)
'in kimono is revealing back' is the wordplay.
'in' says the answer is hidden in the clue.
'back' is a reversal indicator.
'noisrev' is hidden in the letters of 'kimono is revealing'.
'noisrev' in reverse letter order is 'VERSION'.
(Other definitions for version that I've seen before include "Particular form (of something)" , "See 24" , "Sort" , "Model" , "Account from one point of view" .)