
1) Irish province 2) Province of Ireland
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https://www.crosswordclues.com/clue/leinster

Leinster (ər — Laighin / Cúige Laighean — pron) is one of the Provinces of Ireland situated in the east of Ireland. It comprises the ancient Kingdoms of Mide, Osraige and Leinster. Following the Norman invasion of Ireland, the historic fifths of Leinster and Mide gradually merged, mainly due to the impact of the Pale, which straddled both, t...
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http://en.wikipedia.org/wiki/Leinster
[European Parliament constituency] ==History and boundaries== The constituency was created in 1979 for the first direct elections to the European Parliament. It comprised the counties of Carlow, Kildare, Kilkenny, Laois, Longford, Louth, Meath, Offaly, Westmeath, Wexford and Wicklow from the historic province of Leinster excluding the Count...
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http://en.wikipedia.org/wiki/Leinster_(European_Parliament_constituency)

the southeastern province of Ireland, comprising the counties of Carlow, Dublin, Kildare, Kilkenny, Offaly, Longford, Louth, Meath, Laoighis, ... [2 related articles]
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http://www.britannica.com/eb/a-z/l/32

Eastern province of Ireland, that includes Dublin.
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https://techlifeireland.com/irish-society/glossary-of-irish-terms/

Southeastern historic province of the Republic of Ireland, comprising the counties of Carlow, Dublin, Kildare, Kilkenny, Laois, Longford, Louth, Meath, Offaly, Westmeath, Wexford, and Wicklow; area 19,630 sq km/7,580 sq mi; population (2002) 2,105,600. The MacMurroughs were kings of Leinster until the mid-12th century. Their descend...
Found on
https://www.encyclo.co.uk/local/21221
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