E.g. bony past structure (6)
I believe the answer is:
bygone
'past structure' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'e g bony' is the wordplay.
'e g bony' anagrams to 'BYGONE'.
However, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for bygone that I've seen before include "forgotten" , "Erstwhile" , "Of departed days" , "Belonging to the past" , "Gone by (anag.)" .)