Wobbly rain butts not settled properly (2,7)
I believe the answer is:
in arrears
'not settled properly' is the definition.
I can't judge whether this definition defines the answer.
'wobbly rain butts' is the wordplay.
'wobbly' indicates anagramming the letters (I've seen this in other clues).
'butts' becomes 'rears' ('rear' can be a synonym of 'butt').
'rain' with letters rearranged gives 'inar'.
'inar'+'rears'='IN ARREARS'
Can you help me to learn more?
(Other definitions for in arrears that I've seen before include "Overdue" , "Position when a debt remains unpaid after its due date" , "Rare rains beyond the due time" , "Behindhand (with rent)" , "Owing" .)