Here are the possible solutions for this puzzle's theme shape clue
Answer
Clue
Relevancy
arc
Clue
Rainbow shape (it's the puzzle theme!)
Definition
a part of the circumference of a circle or other curve
goingtopot
Clue
Out of shape...or a hint to this puzzle's theme
oval
Clue
This puzzle's theme shape
Definition
egg-shaped
transformers
Clue
2007 shape-changing film, and the theme of this puzzle
info
Clue
Theme word inside this puzzle's theme words
Definition
(short for) information
lllllllllllllllllllll
Clue
Much of the Smurfs' theme song, and this puzzle's theme
rawhide
Clue
Classic TV theme song covered by this puzzle's theme duo
Definition
to beat with a type of whip
four
Clue
Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet)