Good man has a right to take the lead (4)
I believe the answer is:
star
'take the lead' is the definition.
'good man has a right' is the wordplay.
'good man' becomes 'st'.
'has' is a charade indicator (letters next to each other).
'a right' becomes 'ar' (I've seen this in other clues).
'st'+'ar'='STAR'
'to' is the link.
(Other definitions for star that I've seen before include "Outstanding person" , "Polaris, for example" , "Top performer" , "Symbol of excellence" , "Main attraction" .)