Cold dish from a NY hotel? (7,5)

I believe the answer is:

waldorf salad

(Other definitions for waldorf salad that I've seen before include "Apples, celery, walnuts and mayo" , "eats" , "Vegetarian dish of celery, apples, walnuts and mayonnaise" , "Mix of apples, walnuts, celery, etc" .)

I've seen this clue in The Guardian.

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