### Clue: Board move found US credit note (10,5)
### Answer: DISCOVERED CHECK 
 ### Explanation: Definition: Board move
DISCOVERED (found) + CHECK (American version of cheque). I don't like the way "discovered", which is a major part of the answer, is defined in a way that is essentially the same as in the answer. Discovered check occurs in chess where moving one man allows another to check the opponent's King