Possible Clues:

• With 39-Across, like an even split ... and a hint to a pair of Roman numerals in the starred clues' answers
• Life's beginning for Romans — or nearer the end?
• Bill with a snowy owl
• Total number of words used in 41-Across (all of which appear in this and last week's puzzles in the answers to the starred clues)
• This by itself indicates equality
• Variant of 'Tie a dry fly' first appearing in 1958
• Number of stars on Old Glory
• The golden age?
• L
• Half a term for ''evenly''