Ethel, open to change, names rings (9,5)

I believe the answer is:

telephone calls

I'm a little stuck... Click here to teach me more about this clue!

'rings' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.

'ethel open to change names' is the wordplay.
'to change' indicates anagramming the letters.
'names' becomes 'calls' ('call' can be a synonym of 'name').
'ethel'+'open'='ethelopen'
'ethelopen' with letters rearranged gives 'telephone'.
'telephone'+'calls'='TELEPHONE CALLS'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.