Keeps a stew bubbling - it's a bit of a gamble (10)
I believe the answer is:
sweepstake
'a gamble' is the definition.
(I've seen this before)
'keeps a stew bubbling' is the wordplay.
'bubbling' indicates an anagram (I've seen this in other clues).
'keeps'+'a'+'stew'='keepsastew'
'keepsastew' anagrammed gives 'SWEEPSTAKE'.
'it's a bit of' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for sweepstake that I've seen before include "prize" , "System of gambling, especially on horse races" , "Lottery" , "I'd bet on it" , "action on race" .)