Boat's the same even when capsized (5)

I believe the answer is:

kayak

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'boat's' is the definition.
(kayak is a kind of boat)

I cannot understand how the remainder of the clue works.

(Other definitions for kayak that I've seen before include "Inuit boat" , "Boat used by 23 Across" , "A small covered canoe" , "Type of canoe" , "Palindromic canoe used by eskimos" .)

I've seen this clue in The Telegraph and The Globe and Mail.

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