
1) Hymn ascribed to Zoroaster 2) Persian hymn group 3) Sanskrit hymn
Found on
https://www.crosswordclues.com/clue/gatha

Gātha is a Sanskrit term for `song` or `verse`, especially referring to any poetic metre which is used in legends, and is not part of the Vedas but peculiar to either Epic Sanskrit or to Prakrit. The word is originally derived from the Sanskrit/Prakrit root gai, which means, to speak, sing, recite or extol, cognate to the Avestan term gatha. ...
Found on
http://en.wikipedia.org/wiki/Gatha
(Av.) the five sacred hymns of Zarathushtra (Yasna chapters 28-34, 43-51, 53), part of the Avesta; the five supplementary days at the end of the Zoroastrian religious calendar and the fireshtes presiding over them.
Found on
http://www.avesta.org/zglos.html
No exact match found.