Creature in Bratislava (3)
I believe the answer is:
rat
'creature' is the definition.
(I know that rat is a type of scoundrel)
'in bratislava' is the wordplay.
'in' indicates a hidden word.
'RAT' is hidden within 'bratislava'.
(Other definitions for rat that I've seen before include "Abandon" , "Rodent - deserter" , "Long-tailed rodent" , "Rodent pest" , "Renegade" .)