| Answer | Crossword Clue |
|---|---|
| TREMOLO | Organ effect |
| TREMOLO | Sound effect device on a pipe organ. |
| synergists | A substance, organ, or other agent that participates in an effect of synergy |
| synergist | A substance, organ, or other agent that participates in an effect of synergy |
| tremulants | TREMULANT, a device in an organ or electronic instrument for producing a tremolo effect |
| tremulant | tremulous / a device in an organ or electronic instrument for producing a tremolo effect |
