Related Clues:

• Four-note chord
• Four of a kind
• Kiss, e.g.
• Group of four
• A group of four
• It's 44, by the sound of it.
• That's got four 31 acrosses
• A set of four for the volume, and in Latin
• Gift of calling birds, say
• Tips for trombone joining a kind of jazz quartet
• Group of four musicians
• Stringed group
• Two violins, viola and a cello string group
• String group?
• The classical elements, e.g