| Brainstem section | 17 |
| Brainsick | 9 |
| Brainscanning tech. | 19 |
| Brains, informally | 18 |
| Brains, in Brest | 16 |
| Brains' thinking parts | 26 |
| Brains' gains | 17 |
| Brains or beauty, for example | 29 |
| Brains or beauty, e.g. | 22 |
| Brains or beauty | 16 |
| Brains of the operation | 23 |
| Brains of a PC | 14 |
| Brains have high ones | 21 |
| Brains belong to it | 19 |
| Brains behind this puzzle's theme messages | 46 |
| Brains and beauty, e.g. | 23 |
| Brains alternative | 18 |
| Brains | 6 |
| Brainpower measurer | 19 |
| Brainpower | 10 |
| Brainless sort | 14 |
| Brainless one | 13 |
| Brainless bunch | 15 |
| Brainless | 9 |
| Braininess | 10 |
| Brainiacs, typically | 20 |
| Brainiacs | 9 |
| Brainiac, maybe | 15 |
| Brainiac's rival | 20 |
| Brainiac's put-down | 23 |
| Brainiac's grade | 20 |
| Brainiac's asset? | 21 |
| Brainiac's accomplishment | 29 |
| Brainiac school | 15 |
| Brainiac | 8 |
| Brainfreeze beverage | 20 |
| Brained bird or birdbrain | 25 |
| Brainchildren | 13 |
| Brainchild? | 11 |
| Brainchild protector | 20 |
| Brainchild | 10 |
| Braincases | 10 |
| Braincase | 9 |
| Brainbusting | 12 |
| Brainard, the Absent-Minded Professor | 37 |
| Brain-waves rec. | 16 |
| Brain-wave tracings: Abbr. | 26 |
| Brain-wave tracer: abbr. | 24 |
| Brain-wave test: Abbr. | 22 |
| Brain-wave test, briefly | 24 |
| Brain-wave test (Abbr.) | 23 |
| Brain-wave recs. | 16 |
| Brain-wave record: Abbr. | 24 |
| Brain-wave record, familiarly | 29 |
| Brain-wave rec. | 15 |
| Brain-wave reading, for short | 29 |
| Brain-wave letters | 18 |
| Brain-to-brain phenomenon | 25 |
| Brain-teasing Rubik | 19 |
| Brain-teasers | 13 |
| Brain-scan letters | 18 |
| Brain-related | 13 |
| Brain-racked state | 18 |
| Brain-picker's pursuit | 26 |
| Brain-enveloping membranes | 26 |
| Brain-busting | 13 |
| Brain-based | 11 |
| Brain, slangily | 15 |
| Brain, in Scotland | 18 |
| Brain, in Philippines | 21 |
| Brain, in Barcelona | 19 |
| Brain, heart, liver, etc. | 25 |
| Brain's ___ mater | 21 |
| Brain's white matter | 24 |
| Brain's stimulus receptors | 30 |
| Brain's site | 16 |
| Brain's receptors | 21 |
| Brain's offspring | 21 |
| Brain's creation | 20 |
| Brain's counterpart | 23 |
| Brain ___ | 9 |
| Brain waves?: Abbr. | 19 |
| Brain waves monitor: abbr. | 26 |
| Brain waves measurer (Abbr.) | 28 |
| Brain waves | 11 |
| Brain wave test (abbr.) | 23 |
| Brain wave test | 15 |
| Brain wave recording: Abbr. | 27 |
| Brain wave record (Abbr.) | 25 |
| Brain wave record | 17 |
| Brain wave readout, for short | 29 |
| Brain wave reading: Abbr. | 25 |
| Brain wave reading (Abbr.) | 26 |
| Brain wave monitor: abbr. | 25 |
| Brain wave monitor, for short | 29 |
| Brain wave monitor, briefly | 27 |
| Brain wave measurer: abbr. | 26 |
| Brain wave | 10 |
| Brain twister | 13 |
| Brain trusters | 14 |