Here are the possible solutions for this puzzle's theme song clue
Answer
Clue
Relevancy
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
info
Clue
Theme word inside this puzzle's theme words
Definition
(short for) information
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)
Definition
the cardinal number next above three
skewedtooneside
Clue
Like this puzzle's theme, to solvers concerned with puzzle symmetry?
wordladder
Clue
Puzzle invented by Lewis Carroll (and a hint to this puzzle's theme)
meta
Clue
Puzzle-within-a-puzzle puzzle
Definition
(US) concerned with cultural conventions; (of an artistic work) self-referential
