Burn badly (5)
I believe the answer is:
scald
'burn badly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scald that I've seen before include "Heat (milk) to near boiling point" , "Burn with water" , "Hurt with hot water" , "Injure with hot liquid" , "Injure with steam" .)