Put at risk of death, given faulty grenade (10)
I believe the answer is:
endangered
'put at risk' is the definition.
(to endanger is to put something at risk)
'death given faulty grenade' is the wordplay.
'death' becomes 'end' (synonyms).
'given' indicates putting letters inside.
'faulty' indicates anagramming the letters.
'grenade' is an anagram of 'dangere'.
'end' enclosing 'dangere' is 'ENDANGERED'.
'of' is the link.
(Other definitions for endangered that I've seen before include "Put in jeopardy" , "compromised" , "in a perilous situation" , "put at risk" , "Like some species" .)