Summertime

3 clues
Gershwin song
Gershwin tune
Gershwin favorite
Similar answers:
Airtime
Airtimes
Allsummerlong
Amidsummer
Andysummers
Anendlesssummer
Anothertime
Assummer
Asummerfestival
Atalatertime
Atomicsummerine
Atsomeothertime
Boppertime
Boysofsummer
Buffysummers
Burgertime
Catchsummeasure
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Deadairtime
Dinnertime