Crossword Genius

Inappropriate as an idle pageboy? (8-3)

Ross

I believe the answer is:

uncalled-for

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'inappropriate' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?

I can't explain the remainder of the clue.

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(Other definitions for uncalled-for that I've seen before include "Unwarranted" , "Needless" , "Excessive, not welcome" .)

I've seen this clue in The Times.
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