### Clue: Come back without second part of 9 (5)
### Answer: OUNCE 
 ### Explanation: Definition: part of 9
 "bounce"(to come back;to be reflected back) **minus**(without) "b"(second letter of the alphabet, signifying the second in a series).
Defn: 1 of 16 equal parts in the unit of weight, the pound;answer to 9 across.