Historic Ohio, burdened, abandoning America (5)

I believe the answer is:

olden

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

'ohio burdened abandoning america' is the wordplay.
'ohio' becomes 'O' (abbreviation for Ohio).
'burdened' becomes 'laden' (synonyms).
'abandoning' is a deletion indicator.
'america' becomes 'a' (common abbreviation eg in USA).
'laden' with 'a' taken out is 'lden'.
'o'+'lden'='OLDEN'

Can you help me to learn more?

(Other definitions for olden that I've seen before include "(Of days) in the long distant past!" , "of ancient history?" , "Bygone" , "Of past (times)" , "times gone by" .)

I've seen this clue in The Independent.

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