
1) Attic festival 2) Festival in ancient Athens 3) Greek threshing festival
Found on
https://www.crosswordclues.com/clue/haloa
[festival] Haloa or `Alo (῾Αλῶα) was an Attic festival, but celebrated principally at Eleusis, in honour of Demeter (Δήμητρα, η Αλωαίη), protector of the fruits of the earth, of Dionysus, god of the grape and of wine, and Poseidon (Ποσειδώνας ο Φυτάλμιος), god of the seashore vegetation. In Greek, th...
Found on
http://en.wikipedia.org/wiki/Haloa_(festival)

(from the article `Demeter`) Among the agrarian festivals held in honour of Demeter were the following: (1) Haloa, apparently derived from hals (`threshing floor`), begun at ...
Found on
http://www.britannica.com/eb/a-z/h/8
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