Crossword Genius

Underworld ring has change of leader (4)

Ross

I believe the answer is:

hell

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'underworld' is the definition.
(synonyms)

I cannot understand how the rest of the clue works.

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(Other definitions for hell that I've seen before include "'The road to . . . . is paved with good intentions'" , "Abode of the damned" , "Unpleasant place" , "Inferno" , "One of spelt out words" .)

I've seen this clue in The Independent.
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