Here are the possible solutions for bit of footwear that appears at both ends of this puzzle's theme answers clue
Answer
Clue
Relevancy
sock
Clue
Bit of footwear that appears at both ends of this puzzle's theme answers
diy
Clue
"Home work" letters that appear at both ends of this puzzle's theme answers
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
copernicium
Clue
New element whose name will be ratified in January, 2010, and whose symbol appears in the middle of this puzzle's theme answers
Definition
a short-lived artificially produced radioactive element that has 112 protons
postnasaldrip
Clue
Affliction that, read a certain way, appears in this puzzle's three theme answers
sts
Clue
"Two-way" thoroughfares at both ends of this puzzle's long answers
musicalscale
Clue
Parts of it appear at both the starts and ends of this puzzle's eight theme phrases
falsestart
Clue
Athletic infraction ... or what occurs at the beginning of this puzzle's four theme answers, both across and down
