Hotel near Arles is not finished on half of the quay popular with a comic figure (9)
I believe the answer is:
harlequin
But I can't explain it at all! Could you help me understand?
(Other definitions for harlequin that I've seen before include "Entertainer in diamond-patterned clothing" , "Commedia dell'arte clown" , "Pantomime character in a tight spangled costume" , "Traditional pantomime character" , "London rugby player" .)