
1) Ancient Roman festival
Found on
https://www.crosswordclues.com/clue/lucaria

In ancient Roman religion, the Lucaria was a festival of the grove (Latin lucus) held July 19 and 21. The original meaning of the ritual was obscure by the time of Varro (mid-1st century BC), who omits it in his list of festivals. The deity for whom it was celebrated is unknown; if a ritual for grove-clearing recorded by Cato pertains to this fest...
Found on
http://en.wikipedia.org/wiki/Lucaria
No exact match found.