Being yours, though still having to pay about a quarter (6)
I believe the answer is:
owning
'being yours though still' is the definition.
I can't judge whether this definition defines the answer.
'to pay about a quarter' is the wordplay.
'to pay' becomes 'owing'.
'about' is an insertion indicator.
'a quarter' becomes 'n'.
'owing' going around 'n' is 'OWNING'.
'having' is the link.
Can you help me to learn more?
(Other definitions for owning that I've seen before include "Possessing" , "Conceding - possession" , "Possesing" , "In legal possession of" , "Being in possession or confessing" .)