Encore: a band not entirely welcoming one (5)

I believe the answer is:

again

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'encore' is the definition.
(I've seen this in another clue)

I can't explain the rest of the clue.

(Other definitions for again that I've seen before include "Ocne more" , "Furthermore" , "One more time, encore" , "On the other hand" , "'Another time, once more (5)'" .)

I've seen this clue in The Guardian.

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