Vehicles controlled with computers from the rear (5)

I believe the answer is:

trams

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'vehicles' is the definition.
(tram is a kind of vehicle)

I don't understand the rest of the clue.

(Other definitions for trams that I've seen before include "silk yarns" , "public transport" , "old vehicles" , "Not seen in London" , "People movers" .)

I've seen this clue in The Independent.

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