Proper derails used - control dispersed (13)

I believe the answer is:

decentralised

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'dispersed' is the definition.
(both can mean scattered or distributed)

'proper derails used' is the wordplay.
'proper' becomes 'decent' (similar in meaning).
'used' indicates anagramming the letters.
'derails' anagrammed gives 'ralised'.
'decent'+'ralised'='DECENTRALISED'

'control' is the link.
I am not very happy about this link. It may be part of another bit of the clue.

Can you help me to learn more?

(Another definition for decentralised that I've seen is " Put out to local government".)

I've seen this clue in The Daily Express.

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