He made history in long gone years (3)
I believe the answer is:
ney
'he made history' is the definition.
The definition suggests a singular noun which matches the answer.
'in long gone years' is the wordplay.
'in' indicates a hidden word.
'NEY' can be found hidden inside 'long gone years'.
Can you help me to learn more?
(Other definitions for ney that I've seen before include "French soldier" , "One of Napoleon's marshals" , "French marshal sound negitative" .)