| DISTORTION | In acoustics and electronics, any change in a signal that alters the basic waveform or the relationship between various frequency components. (10) |
| RECEIVER | In electronics, any of various devices that accept signals, such as radio waves, and convert them (frequently with amplification) into a useful form. (8) |
| NASTILY | List any changes in a spiteful manner (7) |
| OVATION | American maker of acoustic and semi-acoustic guitars |
| EXPECTS | Waits for word used by Nelson in a signal |
| WEIR | Low dam built across the width of a river that alters the flow (4) |
| OBSTRUCTION | Blockage that alters the contours a bit (11) |
| EARTHQUAKE | Any sudden shaking of the ground caused by the passage of seismic waves through Earth's rocks; it can be a signal that a volcano is about to erupt. (10) |
| ALLCLEAR | A signal that a danger or difficulty, such as an air-raid or illness, is over; or, permission to proceed (3-5) |
| VOL | Stereo knob that alters the degree of loudness for short |
| MATERIAL | Stuff that alters the mail rate (8) |
| VOLUMECONTROL | Dial that alters the sound level (6,7) |
| SILVER | Which precious metal, with the chemical symbol Ag, is known for its high conductivity and use in jewelry, coins, and electronics? (6) |
| LET | When this occurs in badminton, the rally stops and is replayed without any change to the score. (3) |
| TRANSMITTER | It sends a signal that will start term in disorder (11) |
| RANGABELL | Gave a signal that revived a memory? (4,1,4) |
| DIPLOMAT | An official, such as an ambassador or first secretary, engaged in the conduct of the relations of one state with another (8) |
| ELNINO | Warming of the eastern Pacific which alters the weather pattern of the tropics (2,4) |
| SALTPETRE | Chemical that alters pet in such a way (9) |
| GRAMMAR | Study or rules of a language, inflections or other means of showing the relation between words |
