This uses a deletion technique - specifically removing certain positioned letters from a phrase based on an indicator word.
"Oddly disappearing" tells you to remove the odd-positioned letters from "beach huts". Count through each letter's position and keep only the even-positioned ones.
Answer: ECHT | "Oddly disappearing" means remove odd-positioned letters from "beach huts" - keeping positions 2,4,6,8 gives E-C-H-T = ECHT (German word meaning authentic)