Juliet Newton went round Ohio to find a man (4)
I believe the answer is:
john
'a man' is the definition.
(I've seen this before)
'juliet newton went round ohio' is the wordplay.
'juliet' becomes 'j' (phonetic alphabet: alpha, bravo, charlie etc.).
'newton' becomes 'n' ('N' can be a synonym of 'newton').
'went round' indicates putting letters inside (I've seen this in other clues).
'ohio' becomes 'oh'.
'j'+'n'='jn'
'jn' going around 'oh' is 'JOHN'.
'to find' is the link.
(Other definitions for john that I've seen before include "Matthew, Mark, Luke and . . . ." , "and 24: A Beatle" , "Gospel writer" , "Man's name" , "Name of 5" .)