Crossword Genius

Humid current around river (8)

Ross

I believe the answer is:

tropical

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(Other definitions for tropical that I've seen before include "Hot and humid, as north and south of the equator" , "Belonging to hot regions" , "Hot and humid type of weather" , "Fervidly hot" , "April-Oct, unusually humid and very hot" .)

I've seen this clue in The Mirror.
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