Answer: nixie
AnswerCrossword Clue
NIXIEUndeliverable letter, in post-office talk
nixiea letter or parcel that is undeliverable because of a faulty or illegible address.
nixienix
nixiea female water sprite
nixiefemale water spirit
nixieletter or parcel that is undeliverable by the post office because of a faulty or illegible address
NIXIEUndeliverable letter, to a postal worker
NIXIEGermanic water spirit
NIXIEWater sprite
NIXIEDead letter, in post office talk
NIXIEUndeliverable letter
NIXIEUndeliverable piece of mail
NIXIEFemale sprite
NIXIEUndeliverable piece of mail: Slang.
NIXIEWater sprite.
NIXIEWatersprite.
NIXIEUndeliverable mail
NIXIEUndeliverable letter, to postal employees
NIXIEUndeliverable letter, in post-office slang
NIXIEGermanic water sprite