Called about Gran (4)
I believe the answer is:
Here is my best explanation:
'called' is the definition.
('ring' can be a synonym of 'call')
'about gran' is the subsidiary indication.
'about' is an anagram indicator.
'gran' with letters rearranged gives 'rang'.
(Other definitions for rang that I've seen before include "Chimed", "Made a phone call", "Telephoned", "Phoned; did resound", "Called", "(Of bell) sounded" and "Made tolling sound or phoned".)