Steamy room in flat out of bounds, apparently wet (7)
I believe the answer is:
laundry
'steamy room' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'flat out of bounds apparently wet' is the wordplay.
'out of bounds' means to look at the middle letters (the bounds or edges of the word are removed).
'apparently wet' becomes 'undry' (I can't explain this - if you can you should believe this answer much more).
The middle letters of 'flat' are 'la'.
'la'+'undry'='LAUNDRY'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for laundry that I've seen before include "Place for washing clothes" , "Washeteria" , "Keep it clean!" , "Washing facility" , "Dirty washing" .)