Dodgy casinos led to being miserable (12)
I believe the answer is:
'miserable' is the definition.
'dodgy casinos led to' is the wordplay.
'dodgy' indicates an anagram (a dodgy or wrong order of the letters).
'casinosledto' anagrammed gives 'DISCONSOLATE'.
'being' is the link.
(Other definitions for disconsolate that I've seen before include "Unhappy and impossible to comfort" , "Sad; beyond comfort" , "Low in spirits" , "Deeply sad" , "Stuck with the blues" .)