Crossword Genius

Assistance for vessel, we hear, in covered passage (6)

Ross

I believe the answer is:

arcade

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'covered passage' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for arcade that I've seen before include "Colonnade" , "shopping area" , "Covered passage containing shops" , "Lots of games" , "Covered walk with shops" .)

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