Victim dropping off posh car in wharf (4)

I believe the answer is:

quay

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'wharf' is the definition.
(I know that quay is a type of wharf)

I can't explain the rest of the clue.

(Other definitions for quay that I've seen before include "Whatf built parallel to the shoreline" , "Landing place" , "Landing stage, wharf" , "Dock's loading area" , "Some of port" .)

I've seen this clue in The Independent.

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