The answers to the clues below will have something in common.

1. Gets very cheaply
2. Has a reversal of opinion
3. Talks about "the elephant in the room" and makes things less tense
4. Classic love song most famously recorded by the Righteous Brothers

Answers:

1. Buys for a song
2. Changes one's tune
3. Clears the air
4. "Unchained Melody" 

Credit: Lila Cherry