14 letters It's usually presented in a small box, as seen six times in this puzzle's answer Answer: ENGAGEMENTRING
14 letters Some laughable language mistakes - as found literally (in consecutive letters) in 24-, 37-, 55-, 75- and 92-Across Answer: MIXEDMETAPHORS
14 letters Repeated phrase in Martin Luther King Jr.'s "I Have a Dream" speech Answer: LETFREEDOMRING
14 letters Test format ... or a hint to understanding three of this puzzle's clues Answer: FILLINTHEBLANK
14 letters Model/TV host on a record five Sports Illustrated Swimsuit Issue covers Answer: ELLEMACPHERSON
14 letters 1938 #1 hit for 68-/70-Across, which was inspired by a nursery rhyme Answer: ATISKETATASKET