Crossword Genius

Lied misleadingly about the rich, it's sometimes said (4)

Ross

I believe the answer is:

idle

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

'lied misleadingly about the rich it's sometimes' is the wordplay.
'lied' can be anagrammed to 'IDLE'.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for idle that I've seen before include "Trivial" , "staying in bed all day?" , "without basis" , "Indolent" , "Not in action or at work" .)

I've seen this clue in the Evening Standard.
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