Item with features that begin this puzzle's four longest answers

Question:

Answer:

RIVER

Length:

Similar Crossword Questions:

Any of five that begin this puzzle's longest answers
Shades of it begin this puzzle's four longest answers
Spars in the ring, and features of the four longest puzzle answers
Org. that has four teams with non-plural nicknames, which begin this puzzle's four longest answers
Computer malady (and what can follow the starts of the four longest puzzle answers)
HBO's "Inside the __" (and hidden theme in this puzzle's four longest answers)
Word that goes after the start of and before the end of the five longest answers in this puzzle
Last letter in most plurals (but not in this puzzle's six longest answers, which are the only plurals in this grid)
Pet targeted by the first words of this puzzle's four longest answers
Hoop group hidden inside this puzzle's three longest answers
They're hidden in this puzzle's seven longest answers
Annual cause of losing an hr.'s sleep hidden in this puzzle's 10 longest answers
Right now, as hidden in this puzzle's longest answers
Word that can precede the last word of the four longest puzzle answers
Campus party maneuvers, and features of six answers in this puzzle
Rap sheet letters hidden in this puzzle's longest answers
Org. with members found at the ends of this puzzle's three longest answers
Word that can precede the first word of the six longest puzzle answers
Like the six longest answers in this puzzle
It can follow the last word of this puzzle's five longest answers
79, for the chem. symbol at the heart of the four longest puzzle answers
Ocean predator, of which there are five types starting this puzzle's longest answers
Character who, in an 8/15/1939 Hollywood premiere, speaks the first words of this puzzle's five other longest answers
The starts of this puzzle's six longest answers are types of them
Stone that's "cut" in this puzzle's four longest answers