God of myth or legend (4)
I believe the answer is:
thor
'god' is the definition.
(Thor is an example)
'of myth or legend' is the wordplay.
'of' indicates a hidden word.
'THOR' is hidden within 'myth or legend'.
(Other definitions for thor that I've seen before include "Scandinavian thunder-god" , "Norse deity" , "Norse god of war" , "Son of Odin and Freya" , "Germanic thunder god; early US IRBM" .)