Making a call, may one have this in one’s ears? (7)
I believe the answer is:
Here is my best explanation:
'making a call' is the definition.
'one have this in one's ears?' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
'in' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'may' is the link.
(Other definitions for ringing that I've seen before include "Campanology", "Telephoning", "Chiming", "Pealing", "Resonant; forceful", "Having resonant sound", "Resonant; phoning", "Phoning" and "Resounding".)