More veal rib frantically bolted down (11)

I believe the answer is:

irremovable

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'bolted down' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I don't see?

'more veal rib frantically' is the wordplay.
'frantically' is an anagram indicator.
'more'+'veal'+'rib'='morevealrib'
'morevealrib' is an anagram of 'IRREMOVABLE'.

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I've seen this clue in The Sunday Times and The Times.

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