Fifty to one a top man has taste! (6)
I believe the answer is:
liking
'taste' is the definition.
(thesaurus)
'fifty to one a top man' is the wordplay.
'fifty' becomes 'l' (roman numeral).
'to one' becomes 'li' (I've seen this in other clues).
'a top' means to remove the first letter.
'man' becomes 'king' (king is a kind of man**).
'li' with its initial letter taken off is 'i'.
'l'+'i'+'king'='LIKING'
'has' is the link.
(Other definitions for liking that I've seen before include "Partiality" , "Happy about" , "Fondness (for thing)" , "weakness" , "Taste - preference - affection" .)