A model overcome by desire unexpectedly changes again (7)

I believe the answer is:

reedits

'changes again' is the definition.
('edits' is an answer for 'changes' so perhaps 'reedits' is OK for 'changes again')

'a model overcome by desire unexpectedly' is the wordplay.
'a model' becomes 'T' (Ford Model T car).
'overcome by' means one lot of letters goes inside another.
'unexpectedly' indicates anagramming the letters.
'desire' is an anagram of 'reedis'.
't' put into 'reedis' is 'REEDITS'.

I've seen this clue in The Daily Express.

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