Oliver's requests for more? (6)

I believe the answer is:
twists
'oliver's requests for more?' is the definition.
I can't tell whether this definition defines the answer.
'oliver's requests for more?' is the wordplay.
'oliver' becomes 'twist' (as in Oliver Twist).
'requests for more?' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'twist'+'s'='TWISTS'
Can you help me to learn more?
(Other definitions for twists that I've seen before include "Wrenches out of normal shape" , "Dances and turns as Chubby Checker used to" , "Dances as Chubby Checkers used to" , "gets another card turned over" , "plot changes" .)
