Boy on record turned a lever (5)
I believe the answer is:
pedal
'a lever' is the definition.
(I know that pedal is a type of lever)
'boy on record turned' is the wordplay.
'boy' becomes 'dal' ().
'on' is a charade indicator (letters next to each other).
'record' becomes 'EP' (abbreviation for extended play record).
'turned' shows that the letters should be reversed in order.
'ep' backwards is 'pe'.
'dal' put after 'pe' is 'PEDAL'.
(Other definitions for pedal that I've seen before include "work with press from Oxford?" , "cause a revolution in cycling?" , "Brake or clutch perhaps" , "One of two a cyclist needs" , "Power a bike" .)