Old-fashioned carriage for Irving (6)

I believe the answer is:

berlin

I'm a little stuck... Click here to teach me more about this clue!

'old-fashioned carriage' is the definition.
'berlin' can be an answer for 'carriage' (thesaurus). I am unsure of the 'old-fashioned' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for berlin that I've seen before include "Irving -, Russian-born musical composer" , "Capital of Germany" , "A once-divided city" , "Composer of White Christmas" , "City once divided by wall" .)

I've seen this clue in The Irish News.

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