Finish, annoyed, seriously at risk (10)

I believe the answer is:

endangered

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'at risk' is the definition.
(I've seen this before)

'finish annoyed seriously' is the wordplay.
'finish' becomes 'end' (synonyms).
'annoyed seriously' becomes 'angered' (made angry or annoyed. I am not sure about the 'seriously' bit.).
'end'+'angered'='ENDANGERED'

Can you help me to learn more?

(Other definitions for endangered that I've seen before include "in a perilous situation" , "put at risk" , "Vulnerable" , "exposed to risk" , "compromised" .)

I've seen this clue in The Daily Express.

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