Crossword Puzzle Singing without instruments

Clue: Singing without instruments

Some improvisatory singing (SCAT with 4 letters)
Earnings of a big singing group? (NONETPROFIT with 11 letters)
Singing brother of Simon and Theodore (ALVIN with 5 letters)
Singing item (TELEGRAM with 8 letters)
Large string instruments (CELLOS with 6 letters)
First name in singing (YMA with 3 letters)
Instruments with pedals (e.g. HARPS with 5 letters)
Natalie's singing father (NAT with 3 letters)
Jazz instruments (e.g. SAXES with 5 letters)
Business that sells plugged-in string instruments? (HARPELECTRONICS with 15 letters)