Crossword Genius

Otherwise girl has one missing (4)

Ross

I believe the answer is:

else

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'otherwise' is the definition.
(synonyms)

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(Other definitions for else that I've seen before include "Adverb meaning if not, otherwise" , "In addition, besides" , "As an alternative" , "Alternatively" , "Eels (anag)" .)

I've seen this clue in The Irish News.
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