Solvers have to put two parts of the clue together to form a Jeopardy-style Before and After phrase. Then they'll use a third part of the clue to change a letter in the last word. Take the letters from the original word that are changed and it will spell GRADE.
Weird Al [G/C]ore
Neil Diamond in the [R/D]ough
Full House of C[A/U]rds
The Mystery of the Abbey Roa[D/R]
Six Feet Under the S[E/P]a