Related Clues:

• Year abroad
• Year in Trajan's reign
• Fourth in a series
• Year, on monuments
• See 56-Down
• Singer Joey with the 60's Starliters
• Just-passing grade
• Low grade
• River to the North Sea
• Not a grade to be proud of
• Scottish river known for its salmon fishing
• D
• See 58-Across
• Balmoral Castle’s river
• Grand finale?