### Clue: Change coming over arch-criminal, perhaps? (9)
### Answer: PERCHANCE 
 ### Explanation: Definition: perhaps
  PENCE(plural of penny,change you get from bigger denomination money) **containing**(coming over) **anagram of**(criminal) ARCH. 
Answer: Maybe,possibly,perhaps, often literary, as in "To be or not to be…….To sleep, perchance to dream – ay, there's the rub….."