Crossword puzzle clue "down goes 1973 sports line"

"Down goes ___!" (1973 sports line)

Facial hair that starts at the chin line and goes down

"I am not a ___" (1973 Richard Nixon line)

Add vertical line 13 (word 3) and vertical line 3 (word 1) together and enter the answer to the resulting clue on this line

Add vertical line 9 (word 2) and vertical line 7 (word 2) and enter the answer to the resulting clue on this line

Add vertical line 1 (word 1) and vertical line 15 (word 3) and enter the answer to the resulting clue on this line

Add vertical line 15 (word 1) and vertical line 1 (word 3) and enter the answer to the resulting clue on this line

What goes before that goes?