Guiding light to join criminals? (6)

I believe the answer is:

beacon

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'guiding light' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for beacon that I've seen before include "warning to others" , "Warning light on a high point" , "Guilding light" , "Fire on a hill, lit as a signal" , "Guiding device - signal fire" .)

I've seen this clue in The Sun.

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