Poet who wrote "The cow is of the bovine ilk; / One end is moo, the other, milk" (4)
I believe the answer is:
nash
(Other definitions for nash that I've seen before include "Famed English architect" , "Beau --. Ogden --" , "John -- , Regency architect" , "English architect, d. 1835 - English war artist, d. 1946" , "John --, British architect" .)