The answer to this riddle/joke is "clam shouter" (as in clam chowder).
This appears to be an example of a pun - a humorous way of using a word or phrase so that more than one meaning is suggested.
Want more jokes? Check out Onelinefun.com's large collection of best puns one-line jokes rated by viewers.
Telling a joke is not simple. You have to have good timing and a sense of what your audience is expecting so that you will be able to deliver your joke flawlessly.
Here are some tips on how to tell a joke, shared by Confitdent.com.