Called Gran round (4)
I believe the answer is:
rang
'called' is the definition.
(called on the phone)
'gran round' is the wordplay.
'round' indicates anagramming the letters.
'gran' anagrammed gives 'RANG'.
(Other definitions for rang that I've seen before include "Made tolling sound or phoned" , "Called" , "Phoned; reverberated" , "(Of bell) sounded" , "Telephoned" .)