A possible problem for some coming up? (5)
I believe the answer is:
bends
'a possible problem' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I can't explain the rest of the clue.
(Other definitions for bends that I've seen before include "Decompression sickness" , "Road curves" , "deadly to the diver" , "Buckles" , "Painful divers' condition" .)