Enter a clue or pattern or both:
The ClueT. Rex, for one (9 letter answer)
NotesThe answer CARNIVORE is so rare that it appears less than once every 2500 puzzles.
DefinitionCARNIVORE as a noun:
1. a terrestrial or aquatic flesh-eating mammal; "terrestrial carnivores have four or five clawed digits on each limb"
2. any animal that feeds on flesh; "Tyrannosaurus Rex was a large carnivore"; "insectivorous plants are considered carnivores"