Rebuked in Telegraph's cold editorial (7)
I believe the answer is:
scolded
'rebuked' is the definition.
('scold' can be a synonym of 'rebuke')
'in telegraph's cold editorial' is the wordplay.
'in' says the answer is hidden in the clue.
'SCOLDED' can be found hidden inside 'telegraphs cold editorial'.
(Other definitions for scolded that I've seen before include "Rebuked angrily" , "Told off" , "Berated" .)