Repeatedly discovered Wendy fears bingo is becoming attractive (9)

I believe the answer is:

endearing

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

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for endearing that I've seen before include "Charming" , "Disarming" , "Inspiring affection" , "Engaging" , "delightful" .)

I've seen this clue in The Telegraph.

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