Severe health worker put on white coat after removing cereal (7)
I believe the answer is:
drastic
'severe' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for drastic that I've seen before include "'Severe, extreme (7)'" , "Uncompromising" , "Severe, radical (measures)" , "Thoroughgoing" , "Radical, brutal" .)