When a girl goes to South Africa, it's steamy (5)
I believe the answer is:
sauna
'south africa it's steamy' is the definition.
I can't tell whether this definition defines the answer.
'when a girl goes to' is the wordplay.
'when' becomes 'sa' (I can't justify this - if you can you should give a lot more credence to this answer).
'a girl' becomes 'Una' (woman's name).
'goes to' means one lot of letters go next to another.
'sa'+'una'='SAUNA'
Can you help me to learn more?
(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" .)