Source of succinct statement, a page I inserted in short revision (8)
I believe the answer is:
aphorist
'source of succinct statement' is the definition.
The definition suggests a singular noun which matches the answer.
'a page i inserted in short revision' is the wordplay.
'page' becomes 'p'.
'inserted in' indicates putting letters inside.
'revision' indicates an anagram.
'short' anagrammed gives 'horst'.
'i' going into 'horst' is 'horist'.
'a'+'p'+'horist'='APHORIST'
Can you help me to learn more?
(Other definitions for aphorist that I've seen before include "Maxim writer" , "One making pithy observations" , "provider of wisdom" .)