| Driving surface | 15 |
| Transmission site | 17 |
| Transmission part? | 18 |
| Transmission gap | 16 |
| Part of a thought process? | 26 |
| Neurons' point of contact | 29 |
| Neurons' juncture point | 27 |
| Neurological point | 18 |
| Neural junction | 15 |
| Neural impulse junction | 23 |
| Neural gap | 10 |
| Nervous system junction | 23 |
| Nerve impulse locale | 20 |
| Literally, "clasp together" | 37 |
| Link between neurons | 20 |
| Impulse junction | 16 |
| Gap between neurons | 19 |
| Firing point, of a sort | 23 |
| Came together, as nerve endings | 31 |
| Impulse paths | 13 |
| Transmission sites | 18 |
| They act on impulses | 20 |
| Spots between neurons | 21 |
| Gaps between neurons | 20 |
| Of neural firing points | 23 |
| In ___ (harmonious) | 19 |
| Lip-___ | 7 |
| Harmonization | 13 |
| Lip-___ (mouth the words) | 25 |
| Match audio and video | 21 |
| Harmony, for short | 18 |
| Fit the sound to the action | 27 |
| Lip-___ (pretend to sing) | 25 |
| In ___ (working in harmony) | 27 |
| In ___ (together) | 17 |
| In ___ (coordinated) | 20 |
| In __ (together) | 16 |
| Put in harmony | 14 |
| Lip-__ | 6 |
| In ___ (matching, as audio and video) | 37 |
| Harmony, briefly | 16 |
| Harmony, informally | 19 |
| Fit the sound to the action, e.g. | 33 |
| Synchronize, for short | 22 |
| Set at the same time, as watches | 32 |
| Out of ___ (not agreeing) | 25 |
| Lip-___ (pretend sing) | 22 |
| Lip-___ (not really sing) | 25 |
| Lip ___ contest | 15 |
| In __ (harmonious) | 18 |
| Harmonization, for short | 24 |
| Coordinate, digitally | 21 |
| Cause to coincide | 17 |
| Word with lip or 'N | 23 |
| Together, after "in" | 30 |
| Set to the same time | 20 |
| Pop music's 'N__ | 24 |
| Out of ___ (uncoordinated) | 26 |
| Out of ___ (not working well together) | 38 |
| Out of ___ (not harmonizing) | 28 |
| Move lips to music (Abbr.) | 26 |
| Match up, as timepieces | 23 |
| Lip-___ (mime to a recorded song) | 33 |
| Lip attachment? | 15 |
| In --- (harmonious) | 19 |
| In ___ (harmonized) | 19 |
| Harmonization, briefly | 22 |
| Follower of "lip" | 27 |
| Follower of "'N" or "lip" | 49 |
| Fit sound to action, e.g. | 25 |
| Dubbing concern | 15 |
| Coordination | 12 |
| Coordinated (with ''in'') | 41 |
| Working well together, after "in" | 43 |
| Word with in or lip | 19 |
| Word with 'N or lip | 23 |
| Word after in or lip | 20 |
| What collaborators should be in | 31 |
| Together, with "in" | 29 |
| Short agreement? | 16 |
| Put in phase | 12 |
| Pop music's 'N __ | 25 |
| Pop group 'N --- | 20 |
| Out of __: discordant | 21 |
| Out of ___ (not lining up) | 26 |
| Out of ___ (disjointed) | 23 |
| Milli Vanilli's lip action | 30 |
| Matched up, after "in" | 32 |
| Match, informally | 17 |
| Match up, as iPod and laptop files | 34 |
| Match sound to action, e.g. | 27 |
| Match sound to action | 21 |
| Make the same time, as two watches | 34 |
| Make agree briefly | 19 |
| Lip-__: mouth the words | 23 |
| Lip-____ | 8 |
| Lip- -- | 7 |
| Lip- _____ | 10 |
| Lip follower | 12 |
| Lip ___ (sing, in a way) | 24 |