Solutions '80s First Son has 9 entries with similar clues

• 4-letter words
• everbest song ..., one direction song
• alfafirst nato phonetic letter, which sounds like the first greek letter
• esauIsaac's first son
• 5-letter words
• octetSonnet's first eight lines
• introfirst part of a song etc.
• 6-letter words
• reubenFirst son of Jacob (OT)
• peopleBarbra Streisand's first Top 10 song
• sextetSonnet's first six lines
• 15-letter words
• thischarmingmansong by the smiths that was their first uk chart entry, in 1983