Take over from superintendent adopting scheme (8)

I believe the answer is:

supplant

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'take over from' is the definition.
(I've seen this before)

'superintendent adopting scheme' is the wordplay.
'superintendent' becomes 'supt' (I can't explain this - if you can you should believe this answer much more).
'adopting' is an insertion indicator (inserted letters are taken on or adopted).
'scheme' becomes 'plan' (synonyms).
'supt' enclosing 'plan' is 'SUPPLANT'.

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(Other definitions for supplant that I've seen before include "Oust" , "take another's place" , "Supersede and replace" , "Displace" .)

I've seen this clue in The Times.

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