Evidence of editorial changes certain to be found in Times? (8)
I believe the answer is:
erasures
'evidence of editorial changes' is the definition.
'erasures' can be an answer for 'changes' (erasure is a kind of change). I'm unsure of the 'evidence of editorial' bit.
'certain to be found in times?' is the wordplay.
'certain' becomes 'sure' (synonyms).
'to be found in' means one lot of letters goes inside another.
'times?' becomes 'eras' (an era is a time or period).
'sure' put inside 'eras' is 'ERASURES'.
Can you help me to learn more?
(Other definitions for erasures that I've seen before include "Reassure about deletions" , "Acts of destruction" .)