Suggestive, like a sauna (6)

I believe the answer is:

steamy

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'like a sauna' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

(Other definitions for steamy that I've seen before include "Vaporous: lustful" , "risque behaviour?" , "Erotic; like vapour" , "Full of condensation; erotic (story)" , "Erotic - vaporous" .)

I've seen this clue in The Daily Express.

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