### Clue: Cut staff for someone on 8 21? (6)
### Answer: AXEMAN 
 ### Explanation: Definition: someone on 8 21
 AXE(to cut/chop with, well, an axe) + MAN(to staff, say, an organisation).
Defn: An informal term for one in a rock band who plays the electric guitar/answer to 8 21 down.**
So this is how you play a guitar lick: