Crossword puzzle clue "word for beginning that encloses four answers in this puzzle"

Word for "beginning" that encloses four answers in this puzzle

What "encloses" the four longest answers

Athletic infraction ... or what occurs at the beginning of this puzzle's four theme answers, both across and down

Word that can follow the first word of this puzzle's four longest answers

Word that can precede the last word of the four longest puzzle answers

Zamboni-prepared surface, and word that can follow the last word of the puzzle's four longest answers

Govern, or word that can follow the first word of the four longest puzzle answers

Org. that has four teams with non-plural nicknames, which begin this puzzle's four longest answers