Related Clues:

• The 75th meridian in the East
• Part of P.S.T.
• It's based on Greenwich
• What passes locally as fanciful, distant dream
• *It's divided into four zones in the contiguous U.S. states
• System accounting for the enemy in a locality
• Part of PST (2 words)
• Part of P.S.T. (2 words)