Clue: European Libor manipulation? Cry foul! (6)
Answer: BOILER
Explanation: Definition: Cry foul
***(e libor)** [anag:*manipulation*] where E is E(uropean) 
Difficult to highlight exactly what the definition is, as it is a homophone of FOWL, as indicated by [cry] FOUL, a "boiler" being a fowl only good enough to be used as stock.