Hot and humid (6)
'hot and humid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sultry that I've seen before include "Such weather is hot and oppressive" , "Such weather is close and oppressive" , "Passionate" , "Sweltering - arousing passion" , "Close -- sensual" .)
'hot and humid' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tropical that I've seen before include "Hot and humid, as north and south of the equator" , "rainforest areas" , "extremely warm" , "Middle-earth" , "Describes weather that is hot and humid" .)