Top drawer croupiers discard the first and shuffle the rest (8)

I believe the answer is:

superior

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'top' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for superior that I've seen before include "Senior in rank" , "Better than, in a higher class" , "Having higher rank or better skills" , "The largest of the Great Lakes" , "One of the Great Lakes of North America" .)

I've seen this clue in the Sydney Morning Herald.

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