| Bauxite and cinnabar, e.g. | 26 |
| Bauxite and borax, e.g. | 23 |
| Azurite and cuprite, e.g. | 25 |
| Assayers' subjects | 22 |
| Assayer's concerns | 22 |
| Arsenopyrite and feldspar | 25 |
| Clytemnestra's slayer | 25 |
| Electra's co-conspirator | 28 |
| Clytemnestra's son | 22 |
| Member of the house of Atreus | 29 |
| Matricide of Greek myth | 23 |
| Matricidal figure of myth | 25 |
| Iphigenia's brother | 23 |
| Clytemnestra's killer | 25 |
| Agamemnon's avenger | 23 |
| "Odyssey" prince | 26 |
| Monteverdi title character | 26 |
| Monteverdi's first opera | 28 |
| Monteverdi opera of 1607 | 24 |
| Monteverdi opera character | 26 |
| Claudio Monteverdi opera | 24 |
| "___ ed Euridice" | 27 |
| Noted German composer Carl | 26 |
| German composer: 1895-1982 | 26 |
| Carmina Burana composer | 26 |
| Nonprofit's URL suffix | 26 |
| Nonprofit's URL ending | 26 |
| Nonprofit Web site suffix | 25 |
| Nonprofit's U.R.L. ending | 29 |
| End of UNESCO's URL | 23 |
| End of the ASPCA's URL | 26 |
| End of ASPCA's URL | 22 |
| Dot follower, sometimes | 23 |
| Charity's URL ending | 24 |
| Charity's URL ender | 23 |
| URL ender for the ASPCA | 23 |
| URL ender for a charity | 23 |
| U.S.O., for one: Abbr. | 22 |
| The 'O' of WHO: Abbr. | 29 |
| Part of UNESCO's address | 28 |
| Part of many U.R.L.'s | 25 |
| Nonprofit's URL ender | 25 |
| Non-profit's URL ender | 26 |
| Ending of many Web site names | 29 |
| Ending for a non-profit | 23 |
| End of the Red Cross' URL | 29 |
| Common web-address extension | 28 |
| Certain domain name ending | 26 |
| Alternative to .com or .net | 27 |
| Alternative to .com or .edu | 27 |
| Instrument with pedals | 22 |
| Instrument played by Bach | 25 |
| The Phantom's instrument | 28 |
| Radio City Music Hall fixture | 29 |
| Mass instrument, often | 22 |
| Dupré's instrument | 25 |
| It's in the ballpark | 24 |
| Word with house or mouth | 24 |
| Subject of a donor card | 23 |
| Source of ballpark pitches? | 27 |
| Silent film accompaniment | 25 |
| Radio City Music Hall feature | 29 |
| One type of keyboard ... | 24 |
| Mormon Tabernacle highlight | 27 |
| Mass number provider, maybe | 27 |
| Large electronic instrument | 27 |
| It may be played or donated | 27 |
| It has pedals and stops | 23 |
| Instrument with foot pedals | 27 |
| Instrument Schweitzer played | 28 |
| Instrument for pedal pushers? | 29 |
| Instrument for Jimmy McGriff | 28 |
| Haunted-house instrument | 24 |
| Has keyboard and pipes | 22 |
| Grinder's instrument | 24 |
| Garage rock band instrument | 27 |
| E. Power Biggs played it | 24 |
| Company's publication | 25 |
| Choir's accompaniment | 25 |
| Bach's music maker | 22 |
| A human's skin, e.g. | 24 |
| "House" newsletter | 28 |
| Princess Leia's last name | 29 |
| Leia's adopted name | 23 |
| Instruments of knowledge | 24 |
| Princess Leia's surname | 27 |
| Aids for acquiring lore | 23 |
| Medical transplant need | 23 |
| Farmers market marking | 22 |
| Arrange systematically | 22 |
| Systematically arrange | 22 |
| Instruments with stops | 22 |
| Instruments with many pedals | 28 |
| Hymn-playing instruments | 24 |
| Hearts, but not spades | 22 |
| Church hymn accompaniers | 24 |
| Transplanted body parts | 23 |
| They have stops and keys | 24 |
| Mouth and hand instruments | 26 |
| Locations for many pipes | 24 |