One's Gone Missing
1. Coordinate, Clarify, Optimize Athletics
2. Kniving Tasty Animal Slab
3. Rides Inside This Noisily
4. Asleep... Relax... Mentally Emotive
5. Handy, Iconic Kitchen Whip
6. Opals, Ruby: Noggin Cap
7. Hexing Type Who Casts
8. Holding Give Utile Spades
9. Ajar? Hinging closed tight
10. Actual Green Sodding Specimen
11. Exquisite Verbiage — Notable Literature
12. Enemy Vexing Immoral Dead
13. Iceman: Talented Plane Officer
Hints
Each title is four words. You only need one thing from each word. Then you need one more thing, as the title says.
You'll need to reorder, and there's a way to know how.