Crossword Genius

In slapdash manner around Gravesend without wheels (10)

Ross

I believe the answer is:

carelessly

'in slapdash manner' is the definition.
(slapdash means careless or rushed)

I cannot understand how the remainder of the clue works.

(Other definitions for carelessly that I've seen before include "Casually" , "sloppily" , "Without concern" , "Without a thought" , "Incautiously" .)

I've seen this clue in The Guardian.
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