Leaving as a result of being fired (5,3)
I believe the answer is:
'a result of being fired' is the definition.
I can't judge whether this definition defines the answer.
'leaving as' is the wordplay.
'leaving' becomes 'going' (synonyms).
'as' becomes 'off' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
Can you help me to learn more?