Fifty to one a top man has taste! (6)
I believe the answer is:
liking
'taste' is the definition.
(I've seen this in another clue)
'fifty to one a top man' is the wordplay.
'fifty' becomes 'l' (Roman numeral).
'to one' becomes 'i' (Roman numeral).
'a top man' becomes 'king' (male ruler).
'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" .)