Possible Clues:

• Playground fixtures for two
• Playground fixtures for the indecisive?
• Playground devices for two, and a phonetic hint to the starts of 17-, 26-, 47- and 60-Across
• Playground rides for two
• Playground items also called teeter-totters
• They go up and down on a playground
• Keeps changing one's mind
• Vacillates ... or what you can do when you look at the starts of the answers to starred clues?
• Playground levers
• Understands when hugging wife and goes from one extreme to the other ...