Skint (7)
'skint' is the definition.
(synonyms)
This is all the clue.
(Other definitions for broke that I've seen before include "With completely empty pockets" , "Skint" , "Lacking funds" , "Completely out of money" , "See 19" .)
(Other definitions for boracic that I've seen before include "Poor Cockney" , "Broke" , "Acid used as a mild antiseptic" .)