Tell off, chide (8)
I believe the answer is:
admonish
This clue is a double definition.
'tell off' is the first definition.
(I've seen this before)
'chide' is the second definition.
(thesaurus)
(Other definitions for admonish that I've seen before include "censure" , "Scold, wag the finger at" , "Reprove, warn" , "Gently reprove" , "Tell off" .)