
1) Ape from language study 2) Opera by Paul Abraham 3) Singaporean brand
Found on
https://www.crosswordclues.com/clue/viki
[chimpanzee] Viki was the subject of one of the first experiments in ape language. Viki was raised by Keith and Catherine Hayes in the same manner as a human infant, to see if she could learn human words. She was given speech therapy, which involved the Hayeses (her adoptees) manipulating her lower jaw. Eventually, she was able to voice fou...
Found on
http://en.wikipedia.org/wiki/Viki_(chimpanzee)
[website] Viki is a video streaming website based in Singapore that offers on-demand streaming video of TV shows, movies, and music videos from around the world. The company has offices in Singapore, San Francisco, Indonesia, and Seoul, South Korea. The name Viki is a play on the words video and Wiki, drawing similarities to those companies...
Found on
http://en.wikipedia.org/wiki/Viki_(website)

Viki is a cultivated variety of potato.
Found on
http://www.probertencyclopaedia.com/browse/QV.HTM
No exact match found.