Victory was doubly his (6)
I believe the answer is:
nelson
'victory was doubly his' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for nelson that I've seen before include "18th century admiral" , "Trafalgar victor" , "Tar" , "Admiral; wrestling hold" , "'England expects' admiral" .)