Really hot in two ways? (6)
I believe the answer is:
sultry
'really hot' is the definition.
'sultry' can be an answer for 'hot' (similar in meaning). I'm unsure of the 'really' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sultry that I've seen before include "Such weather is hot and oppressive" , "Such weather is close and oppressive" , "Close -- sensual" , "Hot and steamy" , "Passionate" .)