Finish enraged when jeopardised (10)
I believe the answer is:
endangered
'jeopardised' is the definition.
('endanger' can be a synonym of 'jeopardize')
'finish enraged' is the wordplay.
'finish' becomes 'end' (synonyms).
'enraged' becomes 'angered' (synonyms).
'end'+'angered'='ENDANGERED'
'when' is the link.
(Other definitions for endangered that I've seen before include "Like some species" , "Put in jeopardy" , "exposed to risk" , "Vulnerable" , "compromised" .)