Large, current firm possibly appearing in a catalogue (8)

I believe the answer is:

listable

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'appearing in a catalogue' is the definition.
The definition suggests an adjective which matches the answer.

'large current firm' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'current' becomes 'I' (symbol for electric current).
'firm' becomes 'stable' (similar in meaning).
'l'+'i'+'stable'='LISTABLE'

'possibly' acts as a link.

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I've seen this clue in The Independent.

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