Risking death by offending (11)
I believe the answer is:
endangering
'offending' is the definition.
Although both the answer and definition are present participle verbs, I cannot see how they can define each other.
'risking death by' is the wordplay.
'risking' becomes 'angering' (I can't explain this - if you can you should believe this answer much more).
'death' becomes 'end' (synonyms).
'by' says to put letters next to each other.
'angering' put after 'end' is 'ENDANGERING'.
Can you help me to learn more?
(Other definitions for endangering that I've seen before include "Imperilling" , "threatening!" , "running a risk" .)