The term VENISON SOURCE can be solved by three crossword solutions: ELK (3 letters), DEER (4 letters), and REDDEER (7 letters). ELK, DEER, and reindeer are all members of the Cervidae family, which includes over 60 species of hoofed mammals. ELK are the largest species in the family, while DEER are the most widely distributed. Reindeer are found mainly in northern Europe and Asia, and are the only species of DEER in which both sexes grow antlers. All three species are hunted for their meat, which is known as venison.