Called about Gran (4)
I believe the answer is:
rang
'called' is the definition.
('ring' can be a synonym of 'call')
'about gran' is the wordplay.
'about' is an anagram indicator.
'gran' with letters rearranged gives 'RANG'.
(Other definitions for rang that I've seen before include "(Of bell) sounded" , "Chimed" , "Telephoned" , "Called" , "Phoned; did resound" .)