One month camping following a repayment (9)
I believe the answer is:
atonement
'repayment' is the definition.
(thesaurus)
'one month camping following a' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is present in the answer.
'a' could be 'one' and 'one' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for atonement that I've seen before include "Making amends" , "Compensation for a wrong" , "reparations?" , "satisfaction" , "Expiation of sin, penance" .)