Sulked on a motorcycle (5)
I believe the answer is:
I believe this is a double definition.
'sulked' is the first definition.
(I've seen this before)
'motorcycle' is the second definition.
(I know that moped is a type of minibike)
'on a' is the link.
(Other definitions for moped that I've seen before include "Wandered about listlessly" , "simple conveyance" , "Light motorbike" , "Sulked - form of transport" , "sort of bike" .)