The gambler is cured? (6)
I believe the answer is:
better
I believe this clue is a double definition.
'the gambler' is the first definition.
(someone who makes bets is a gambler)
'is cured?' is the second definition.
(I've seen this before)
(Other definitions for better that I've seen before include "Comparatively good" , "Gambler; cured" , "recovering from illness" , "More competent - gambler" , "Gambler; more effective" .)