Have we finished first passage at parting? (2,4,3)

'have we finished' is the definition.
I know nothing about this answer so I can't judge whether this works.

'first passage at parting?' is the wordplay.
I cannot quite understand how this works, but
'first' could be 'ist' (ist resembles 1st) and 'ist' is located in the answer.
'at' is present in the answer.
'passage' could be 'hall' (hall is a kind of passage) and 'hall' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?