Various rooms ultimately somewhat damp? (6)
I believe the answer is:
sundry
'various' is the definition.
(sundry means various or diverse)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sundry that I've seen before include "Various, assorted" , "more than a couple" , "All and . . . . . . means everyone" , "All and . . . . . . includes everyone" , "Assorted, miscellaneous" .)