
1) Monastic 2) Monk 3) Trappist
Found on
https://www.crosswordclues.com/clue/cistercian

1) Monk 2) Nun 3) Trappist
Found on
https://www.crosswordclues.com/clue/cistercian

A monk, or lay brother or nun, of the Cistercian Order. They wore white so were called the White Monks. The Cistercians were a reforming order of the Church, who sought to reform the church through spiritual and physical hardship, from 1098AD. This was first achieved at Citeaux from where the order took its name - under the leadership of Stephen H...
Found on
http://www.encyclo.co.uk/local/20766

Religious of the Order of Cîteaux, a Benedictine reform, established at Cîteaux in 1098 by St. Robert, Abbot of Molesme in the Diocese of Langres, for the purpose of restoring as far as possible the literal observance of the Rule of St. Benedict.
Found on
http://www.mdlp.co.uk/genweb/glossary.htm

a member of an order of monks and nuns founded in 1098 at Citeaux, near Dijon, France, under the rule of St. Benedict.
Found on
https://www.infoplease.com/dictionary/cistercian
No exact match found.