Ready for a bath? (6)

I believe the answer is:

unclad

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'ready' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

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(Other definitions for unclad that I've seen before include "Uncovered" , "Naked" , "Not wearing clothes" , "nude" , "without clothing" .)

I've seen this clue in the Evening Standard.

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