Crossword Genius

Listed jerks least likely to offer help? (6)

Ross

I believe the answer is:

idlest

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'least likely to offer help?' is the definition.
I can't tell whether this definition defines the answer.

'listed jerks' is the wordplay.
'jerks' indicates anagramming the letters (I've seen 'jerk' mean this).
'listed' with letters rearranged gives 'IDLEST'.

Can you help me to learn more?

(Other definitions for idlest that I've seen before include "Most inactive or indolent" , "Most lazy" , "Least diligent" , "least fond of Labour?" , "most unused" .)

I've seen this clue in The Times.
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