Crossword puzzle clue "man who's first in 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

First-in-line's line

Man who's first in line?

Socialite who wrote "How to Catch a Man, How to Keep a Man, How to Get Rid of a Man"

"___ Man's, Man's, Man's World"