Controlling slum after redevelopment (9)

I believe the answer is:

masterful

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'controlling' is the definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?

'slum after redevelopment' is the wordplay.
'redevelopment' indicates an anagram.
'slum'+'after'='slumafter'
'slumafter' anagrammed gives 'MASTERFUL'.

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(Other definitions for masterful that I've seen before include "expert" , "overbearing" , "Having dominating quality" , "Authoritative" , "Dominant" .)

I've seen this clue in the Sydney Morning Herald.

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