"Who wants my jellyfish? / I'm not sellyfish!" poet (4)

I believe the answer is:

nash

(Other definitions for nash that I've seen before include "Marble Arch designer" , "Ogden --, US humorous poet" , "John --, British architect" , "Uncontrollable emotion" , "Famous dandy, Beau --" .)

I've seen this clue in the L.A. Times Daily and the LA Times.

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