Extra letters from wordplay spelt out "think sequentially". Paired unclued entries suggested two or three consecutive letters of the alphabet, as follows: the basics = ABC; brilliant, slang = DEF; clarified butter = GHI; airline company = KLM; countrywide survey = NOP; fourth part = QR (ie, quarter); German car = VW; maths variables = X, Y, Z. There was no J in the grid or the clues. The name STU (a homophone of "stew" = scouse) completed the alphabet.
Conventions: * = anagram, < = reversal
| No | Answer | Explanation [extra letter] |
|---|---|---|
| Across | ||
| 1 | MEGABIT | MEG + A BIT |
| 4 | CAMBRIC | CA + MB + RIC(h) |
| 7 | AMELANCHIER | (CHARLIE MEAN[T]) * |
| 8 | AIL | [H]AIL |
| 9 | THRU | RUTH * |
| 11 | IMMIT | M in (I + MIT) |
| 12 | YELPER | REPLY < around E |
| 13 | SÉANCE | SEA + N[I]CE |
| 15 | TEXT | T + EXIT − I |
| 17 | ANI | IAN * |
| 19 | ZAIRE | (A + Z) < + I[N] RE |
| 21 | AUBRY | (BUY (c)AR) * |
| 23 | CHATTI | C + HATTIE − E |
| 24 | RUBIES | RUB + I[K]E’S |
| 26 | ANTAE | A + N(o)T + AE |
| 29 | ATE | TE(d) after A |
| 30 | SUMO | SUM[S] + O |
| 33 | ISLET | IS + L[E]ET |
| 35 | FOUR-OAR | FOU + ROAR |
| 37 | EROS | (lett)ER OS(tensibly) |
| 38 | EAR | NEAR − N |
| 39 | SHAKILY | S[Q] + K in HAIL + (da)Y |
| 40 | HANDLES | HAND + LES |
| Down | ||
| 2 | ALUM | CALUM − C |
| 3 | T-CARTS | (RAT C[U]TS) * |
| 4 | CHINESE | SEEN * after CHI |
| 5 | AIRY | FAIRY − F |
| 6 | RAN | R[E]AN |
| 10 | STENTS | S + TENTS |
| 14 | EQUUS | QU in SUE < |
| 16 | TAHA | (A + H + A[N]T) < |
| 18 | FRIAR TUCK | FRI[T] + AR + TUCK |
| 20 | ÉTAGE | [I]E + (GET A) * |
| 22 | YENS | DOYENS − DO |
| 23 | CRISIS | C[A]R + ISIS |
| 25 | BLET | (ta)BLET(s) |
| 27 | HUSAYN | SAY in HUN |
| 28 | AVERIL | [L]AV + IRE < + L |
| 31 | YESES | SE[L]SEY < |
| 32 | ROUL | LUXOR < − X |
| 34 | LEWD | W in LED |
| 36 | ORA | O’ + RA[Y] |