US city offering boat trip round Lapland, might you say? (5,4)

I believe the answer is:

santa cruz

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'us city' is the definition.
'santa cruz' can be an answer for 'city' (I have seen 'Californian city ' mean 'santa cruz' so perhaps 'city' could also mean 'santa cruz'). I'm not certain of the 'us' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for santa cruz that I've seen before include "Californian city" , "South American city" , "Chief town on La Palma" , "Tenerife's main city" , "Tenerife capital" .)

I've seen this clue in The Times.

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