Jokes from expert succeeded (6)
I believe the answer is:
cracks
'jokes' is the definition.
'expert succeeded' is the wordplay.
'expert' becomes 'crack' (I've seen this before).
'succeeded' becomes 's' (genealogical abbreviation).
'crack'+'s'='CRACKS'
'from' acts as a link.
(Other definitions for cracks that I've seen before include "Splits; quips" , "Attempts" , "'Fractures, splits (6)'" , "They're how the light gets in, according to Leonard Cohen" .)