Castigated what assessor did (5)
I believe the answer is:
rated
'castigated' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for rated that I've seen before include "highly regarded" , "Reckoned" , "Had a high opinion of" , "Estimated, set at" , "deserved" .)