Succeeded? Success is hard and beastly (7)
I believe the answer is:
swinish
'beastly' is the definition.
(I've seen this before)
'succeeded? success is hard' is the wordplay.
'succeeded?' becomes 's' (genealogical abbreviation).
'success' becomes 'win' (I've seen this in another clue).
'hard' becomes 'h' (abbreviation used in pencil classifications).
's'+'win'+'is'+'h'='SWINISH'
'and' acts as a link.
(Other definitions for swinish that I've seen before include "Piglike" , "Like a cad" , "Porcine" , "like Eumaeus's charges" , "Piggy" .)