Some children gawped over his ring (6)
I believe the answer is:
wagner
'his ring' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'some children gawped over' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'over' says the letters should be written in reverse.
'rengaw' can be found hidden inside 'children gawped'.
'rengaw' written backwards gives 'WAGNER'.
(Other definitions for wagner that I've seen before include "German composer of The Flying Dutchman" , "Composer of ''The Flying Dutchman'' etc" , "We rang up the composer" , "Richard . . . . . . composer of 'The Flying Dutchman' and 'Lohengrin'" , "Noted German" .)