Answer: dlo

AnswerCrossword Clue
DLOWhere some letters go: Abbr.
DLOUSPS "graveyard"
DLOPO grave
DLOPlace for undelivered mail: abbr.
DLOP.O. spot for undeliverable mail
DLONixies' home: Abbr.
DLOLost-mail dept.
DLOPostal limbo: Abbr.
DLOWhere some mail goes: Abbr.
DLOPlace for unclaimed mail: Abbr.
DLOWhere mail to Santa ends up, briefly
DLOWhere lost letters go: Abbr.
DLODept. for unclaimed mail: Abbr.
DLOWhere undelivered mail goes: Abbr.
DLOWhere dead letters go: Abbr.
DLOPO cul de sac
DLOPlace for undeliverable mail: Abbr.
DLOWhere undeliverable mail goes: Abbr.
DLOUSPS graveyard
DLOUSPS limbo