Young fellow requesting extra dance (5)
I believe the answer is:
twist
This clue is a double definition.
'young fellow requesting extra' is the first definition.
(Oliver Twist - 'can I have some more?')
'dance' is the second definition.
(twisting is a kind of dancing)
(Other definitions for twist that I've seen before include "Request for another card" , "Sixties dance; cheat" , "See 16" , "See 14" , "Bend round; dance" .)