Look, dwarf built a hotel (7)
I believe the answer is:
waldorf
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for waldorf that I've seen before include "And 5 ac: cold dish" , "Vegetarian dish of celery, apples, walnuts and mayonnaise" , "Celery, apple, etc. salad" .)