Pay for the use of missing lead without any problem (4)
I believe the answer is:
ease
'problem' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ease that I've seen before include "Leisure, comfort" , "Lessen intensity" , "'Comfort, rest (4)'" , "Effortlessness" , "Comfort; facility" .)