Crossword Genius

Second-hand vehicles lacking leads had to be carried (6)

Ross

I believe the answer is:

sedans

'had to be carried' is the definition.
(sedan chairs historically had to be carried)

I cannot understand how the remainder of the clue works.

(Other definitions for sedans that I've seen before include "Cars" , "carried chairs" .)

I've seen this clue in The Guardian.
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