Disciples make up a story at Vatican City between drinks (9)

I believe the answer is:

believers

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'disciples make up a' is the definition.
I can't judge whether this definition defines the answer.

'story at vatican city between drinks' is the wordplay.
'story' becomes 'lie' (story can mean a fabrication).
'at' is a charade indicator (letters next to each other).
'vatican city' becomes 'v'.
'between' is an insertion indicator.
'drinks' becomes 'beers' (beer is a kind of drink).
'lie'+'v'='liev'
'liev' inserted into 'beers' is 'BELIEVERS'.

Can you help me to learn more?

I've seen this clue in The Hindu.

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