Official document indicates two assistants left with animal (5,4)
I believe the answer is:
papal bull
'official document' is the definition.
(I know that papal bull is a type of decree)
'two assistants left with animal' is the wordplay.
'two assistants' means two replacements for 'assistant'.
'assistant' becomes 'PA' (personal assistant).
'assistant' becomes 'PA' (personal assistant).
'left' becomes 'l' (common abbreviation).
'with animal' becomes 'bull' (bull is a kind of animal. I am not sure about the 'with' bit.).
'pa'+'pa'+'l'+'bull'='PAPAL BULL'
'indicates' is the link.
Can you help me to learn more?
(Other definitions for papal bull that I've seen before include "Formal document from the Vatican" , "Official letter from Rome" .)