Made steady jockey stable lad (9)

I believe the answer is:

ballasted

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'made steady' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Maybe there's an association between them I don't understand?

'jockey stable lad' is the wordplay.
'jockey' indicates anagramming the letters (the letters scramble or jockey around).
'stable'+'lad'='stablelad'
'stablelad' anagrammed gives 'BALLASTED'.

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I've seen this clue in The Times.

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