Seethed (6)
'seethed' is the definition.
('boil' can be a synonym of 'seethe')
This is the entire clue.
(Other definitions for boiled that I've seen before include "Cooked in hot water" , "Heated to point at which vapour forms" .)
'seethed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for saw red that I've seen before include "Grew furious" , "(In anger) totally lost control" .)