Man with unfaithful wife among those admired (5)
I believe the answer is:
hosea
'man with unfaithful wife' is the definition.
(Biblical figure)
'among those admired' is the wordplay.
'among' indicates the answer is hidden within the clue.
'HOSEA' is hidden in the letters of 'those admired'.
(Other definitions for hosea that I've seen before include "bookmaker" , "Minor prophet and book of the Old Testament" , "Book writer" , "Good book" , "OT prophet/book" .)