
1) Expert in ancient law 2) Jurist 3) Law maven 
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https://www.crosswordclues.com/clue/legist

1) Lawyer 
Found on 
https://www.crosswordclues.com/clue/legist

 A Legist, from the Latin lex `law`, is any expert or student of law. It was especially used since the Carolingian dynasty for royal councillors who advised the monarch in legal matters, and specifically helped base its absolutist ambitions on Roman Law. More generally they were teachers of civil or Roman law, who, besides expounding sources, exp.....
Found on 
http://en.wikipedia.org/wiki/Legist

person knowledgeable about the law
Found on 
http://phrontistery.info/l.html

• (n.) One skilled in the laws; a writer on law.
Found on 
http://thinkexist.com/dictionary/meaning/legist/
 Le'gist
Le'gist (lē'jĭst) 
 noun [ French 
 légiste , Late Latin 
 legista , from Latin 
 lex , 
 legis , law. See 
 Legal .] One skilled in the laws; a writer on law. 
 Milman.  J. Morley. Found on 
http://www.encyclo.co.uk/webster/L/28

legist One well versed or skilled in the law; a jurist.
Found on 
http://www.wordinfo.info/words/index/info/view_unit/1160/3
  No exact match found.