Possible Clues:

• The Byrds No. 1 hit whose lyrics come from Ecclesiastes, and what can be found at the starts of 20-, 27-, and 48-Across
• 1965 Byrds hit with the words "There is a season"
• 1965 Byrds hit
• 1965 #1 Byrds hit ... as suggested by this puzzle's circled squares?
• #1 hit by the Byrds ... or directions for reading the answers to this puzzle's starred clues (always clockwise as indicated)
• 1965 hit tune
• 1965 chart topper
• 1965 #1 hit by the Byrds