Compromised? Stop seething (10)

I believe the answer is:

endangered

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'compromised?' is the definition.
('endanger' can be a synonym of 'compromise')

'stop seething' is the wordplay.
'stop' becomes 'end' (synonyms).
'seething' becomes 'angered' (I am not sure about this - if you are sure you should believe this answer much more).
'end'+'angered'='ENDANGERED'

Can you help me to learn more?

(Other definitions for endangered that I've seen before include "compromised" , "Put in jeopardy" , "exposed to risk" , "Like some species" , "Vulnerable" .)

I've seen this clue in The Everyman puzzle in The Observer.

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