The turn of Oliver (5)
I believe the answer is:
twist
I believe this is a double definition.
'the turn' is the first definition.
('twist' can be a synonym of 'turn')
'oliver' is the second definition.
(I've seen this before)
'of' acts as a link.
(Other definitions for twist that I've seen before include "surprising plot development" , "tobacco to chew?" , "Wring" , "Dance - unexpected turn" , "Screw; distort" .)