Craving money, earn in gambling houses (8)
I believe the answer is:
yearning
'craving' is the definition.
(I've seen this before)
'money earn in gambling houses' is the wordplay.
'houses' indicates the answer is hidden within the clue (part of the clue houses the answer).
'YEARNING' is hidden in the letters of 'money earn in gambling'.
(Other definitions for yearning that I've seen before include "Unfulfilled desire or need" , "Longing - desire" , "Hankering, longing" , "Strong desire" , "Feeing great desire" .)