Policeman gives amphetamine to company parking (5-3)

I believe the answer is:

speed-cop

'policeman' is the definition.
(speed cop is a kind of policeman)

'amphetamine to company parking' is the wordplay.
'amphetamine' becomes 'speed' (speed is a kind of amphetamine).
'to company' becomes 'co' (abbreviation).
'parking' becomes 'p' (abbreviation on road signs).
'speed'+'co'+'p'='SPEED-COP'

'gives' acts as a link.

I've seen this clue in the Sydney Morning Herald.

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