Clue: Leaders of punk's oldest groups organised a dance (4)
Answer: POGO
Explanation: Definition: a dance

[*leaders of*] **P**(unk's)** O**(ldest) **G**(roups) **O**(rganised)
 

 
*This takes me back to my teens; the pogo was a "dance", which basically involved jumping up and down, associated with punk music.