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 "Made a phone call", "Chimed", "Telephoned", "Called", "Phoned; did resound", "Phoned; reverberated", "(Of bell) sounded" and "Made tolling sound or phoned".)