Crossword Genius

Fair - and fully clad (6)

Ross

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'fair' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(Other definitions for decent that I've seen before include "Sufficiently clothed", "Honest and modest", "Seemly, respectable", "Honourable or modest", "Sufficient".)

I've seen this clue in Sydney Morning Herald.