His very greatness occasioned exclamation (5)
I believe the answer is:
scott
'his very greatness occasioned exclamation' 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 scott that I've seen before include "Sir Walter --, writer" , "He died leading Antarctic expedition" , "Sir Peter -----, ornithologist son of a great explorer" , "Ivanhoe author" , "old novelist" .)