
1) Buddhist demon 2) Ghost in Hindu mythology
Found on
https://www.crosswordclues.com/clue/preta

Preta, प्रेत (Sanskrit), Peta (Pāli) or Yidak (ཡི་དྭགས་) in Tibetan ) is the name for a type of (arguably supernatural) being described in Buddhist, Hindu, Sikh, and Jain texts that undergoes more than human suffering, particularly an extreme degree of hunger and thirst. They are often translated into English as `hungry....
Found on
http://en.wikipedia.org/wiki/Preta

Hungry ghost. A being obsessed by ATTACHMENT, living in the preta-realm within DESIRE REALM, mainly suffering from lack of food, drink and shelter.
Found on
http://viewonbuddhism.org/glossary_az.html

(from the article `Buddhism`) ...of paper, some very large, which are then burned in the evening. The purpose of the celebration is twofold: to remember the dead and to free those ... The two remaining gatis, those of the pretas (`hungry ghosts`) and the hell beings, are mythically important in two respects. The descriptions ....
Found on
http://www.britannica.com/eb/a-z/p/110

a wandering or disturbed ghost.
Found on
https://www.infoplease.com/dictionary/preta
No exact match found.