Picture that is displayed after revolutionary reduction in excess weight (6)
I believe the answer is:
selfie
'picture' is the definition.
(I know that selfie is a type of picture)
'that is displayed after revolutionary reduction in excess weight' is the wordplay.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'displayed after' is a charade indicator (letters next to each other).
'revolutionary' shows that the letters should be reversed in order (letters revolve around).
'reduction in' means to remove the last letter (the number of letters in the word is reduced).
'excess weight' becomes 'flesh' (I've seen this before).
'flesh' with its final letter taken off is 'fles'.
'fles' reversed gives 'self'.
'ie' after 'self' is 'SELFIE'.
(Other definitions for selfie that I've seen before include "Personal photo" , "21 [PHOTO]" .)