When a girl goes to South Africa, it's steamy (5)
I believe the answer is:
sauna
But I can't explain it at all! Could you help me understand?
(Other definitions for sauna that I've seen before include "Type of bath" , "Finnish-style bath" , "Scandinavian hot room for cleansing oneself" , "Form of steam bath" , "Very hot room for cleansing, of Finnish origin" .)