Tic-tac-toe line ... and a hint to this puzzle's theme

Question:

Answer:

OOO

Length:

Similar Crossword Questions:

Looping on-line image, and hint to this puzzle's theme
Garbo line from "Grand Hotel" (and a hint to this puzzle's theme)
Classic breakup line, and a hint to the formation of this puzzle's theme answers
"All of Me" actress whose first name is a hint to this puzzle's theme
Moving aids, or a hint to this puzzle's theme
Gift card phrase, a homophonic hint to the puzzle's theme
Office building problem that's a hint to this puzzle's theme entries (see their last three letters)
Tip, and a hint to this puzzle's theme found in five answers
Sailor's OK, and a phonetic hint to this puzzle's theme
Break, briefly ... or a hint to this puzzle's theme
Middleman (and a hint to this puzzle's theme)
Party with too many dudes... or a hint to this puzzle's theme
"Have a nice day" response, and a literal hint to this puzzle's theme
Stretch ... or a hint to this puzzle's theme?
Eternal, and a hint to this puzzle's phonetic theme
Tongue features (and a hint to this puzzle's theme)
Winter feature with a hint to today's puzzle theme
Stranded at the ski lodge, perhaps, and a hint to this puzzle's hidden theme
Unqualified (with a hint to this puzzle's theme)
Subject of the Final Jeopardy! question that knocked out Ken Jennings after a record 74 wins ... or a hint to this puzzle's theme
Primitive trophies ... or a hint to this puzzle's theme
Contract extras, and read differently, a hint to this puzzle's theme
Disappearing sound, and a hint to this puzzle's theme
Press time (and a hint to this puzzle's theme)
NBA military appreciation initiative, and a hint to this puzzle's theme