They have to be paid for rings (5)
I believe the answer is:
tolls
'rings' is the definition.
(tolling is a kind of ringing)
'they have to be paid' is the wordplay.
I cannot quite see how this works, but
'to' is within the answer.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for tolls that I've seen before include "bars" , "Hemingway novel 'For Whom the Bell . . . . .'" , "Road charges" , "Chimes mournfully" .)