Clue: Return nos.

Answer: SSNS

Length: 4

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Similar Clues:

• Nostalgia stimulus (OLDIE with 5 letters)
• They can't be returned (DEADLETTERS with 11 letters)
• ''Return of the Jedi'' heroine (LEIA with 4 letters)
• Part of a nostalgic plea (TURNBACKWARDOTIME with 17 letters)
• They handle many returns (CPAS with 4 letters)
• Green-skinned dancer in "Return of the Jedi" (OOLA with 4 letters)
• Nosy Parkers (e.g. PRYERS with 6 letters)
• Workers concerned with net returns? (SEINERS with 7 letters)
• Return mailer: Abbr. (SASE with 4 letters)
• Late return from lunch, perhaps (ONETEN with 6 letters)