Crossword Genius

Look-alike may be dead (6)

Ross

I believe the answer is:

ringer

I'm a little stuck... Click here to teach me more about this clue!

'look-alike' is the definition.
(I know that ringer is a type of look-alike)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for ringer that I've seen before include "Lookalike" , "American impostor" , "Campanologist - if dead, double" , "One making the toll" , "someone who shouldn't be competing?" .)

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