Clue: Arm that's hairy and small, short 3 (3-7)
Answer: SIX-SHOOTER
Explanation: Definition: Arm
Devious: two references to other answers. A charade of SIX ('hairy' is the answer to clue six down) plus S ('small') plus HOOTER (NOSED is the entry in '3'D; cut it 'short', it becomes NOSE. Americans might be more familiar with another colloquial meaning of HOOTER)