It's in Belgium, but part Spanish (3)

I believe the answer is:

spa

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'part spanish' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for spa that I've seen before include "Resort with mineral water spring" , "Watering hole" , "where health benefits are offered" , "Healthy place" , "Watering place" .)

I've seen this clue in the Evening Standard.

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