Ring about safe (7)
I believe the answer is:
resound
'ring' is the definition.
('resound' can be a synonym of 'ring')
'about safe' is the wordplay.
'about' becomes 're' (regarding).
'safe' becomes 'sound' ('sound' can be similar in meaning to 'safe').
're'+'sound'='RESOUND'
(Other definitions for resound that I've seen before include "Reverberate" , "Echo" , "ring" .)