More forthcoming gossip linked to bank (8)

I believe the answer is:

chattier

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'more forthcoming' is the definition.
Both the definition and answer are comparative adjectives. Maybe there's an association between them I don't understand?

'gossip linked to bank' is the wordplay.
'gossip' becomes 'chat' ('chat' can be a synonym of 'gossip').
'linked to' is a charade indicator (letters next to each other).
'bank' becomes 'tier' (I've seen this before).
'chat'+'tier'='CHATTIER'

Can you help me to learn more?

I've seen this clue in the Irish Times.

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