Articulated lever for jackpot (5)
I believe the answer is:
prize
'for jackpot' is the definition.
(thesaurus)
'articulated lever' is the wordplay.
'articulated' shows a homophone (sound like).
'lever' becomes 'prise' (synonyms).
'prise' is a homophone of 'PRIZE'.
(Other definitions for prize that I've seen before include "Reward won in competition" , "See 24 Down" , "Trophy" , "Reward for win" , "Token of victory" .)