Crossword puzzle clue "how you start something"

Start something that one shouldn't start

"Something you would cheat on if you knew you wouldn't get caught." "___" (also, the source of this puzzle's theme answers)

You can't know if you like something unless you do this to it!!!

Feeling that you've seen something before seen something before

"If You See Something, Say Something" transit org.

How you start something

Baffles (ABOUT THIS PUZZLE: If you saw the headline "Fiend Found!" you might instantly notice that, between the two words, only the vowels change — the consonants stay put. Okay, if you were me, you'

“But it wasn’t a dream. It was a place. And you, and you, and you ... and you ___ there”