Extra letters in wordplay spelt out “Certain signs precede certain events; Cicero”, Cicero being a lawyer (brief). Substituting symbols for the strings omitted from answers (AT = @, RATIO = : or /, SUM = Σ or +, AND = & or +) in cells preceding entries that could be events (census, circus, opera, drama) created new words (senATor, mANDrel, reSUMe, satuRATIOn). The displaced letters make TIRO, a slave of Cicero who invented a system of shorthand.
Conventions: * = anagram, < = reversal
| No | Answer (omitted letters) | Explanation [extra letter] |
|---|---|---|
| Across | ||
| 1 | SENIOR | SER around [C]OIN < |
| 5 | FOULED | FO[E] + DUEL * |
| 10 | PROOF | O[R] in PROF |
| 13 | ESPRIT | [T]EST around PRI(g) |
| 14 | CENSUS | (N after [A]CE) + SUS |
| 15 | CHEESE | CH[I]NESE with E for N |
| 16 | NEPIT | PI[N] in NET |
| 17 | CIRRIGRADE | (GRID CARRIE[S]) * |
| 20 | README | A[I]D in (RE + ME) |
| 22 | MOREL | [G]ORE in M(amma)L |
| 23 | SEAZE | ZE[N] after SEA |
| 25 | AREDES | AS[S] around (RED + E) |
| 28 | BURNET ROSE | (BURN + ROSE) around [P]ET |
| 30 | TOUTS | T[R]OUTS |
| 32 | PHASIC | P + HAS + IC[E] |
| 34 | UPKEEP | [C]UP + PEEK < |
| 35 | CIRCUS | CIRC[E] + US |
| 36 | SAINT | SA[D] + I + NT |
| 37 | NORITE | ON[E] < + homophone of RIGHT |
| 38 | STATUE | [C]U in STATE |
| Down | ||
| 1 | SPECCY | ECC[E] in SPY |
| 2 | NOT(AT)E | NO + TATE |
| 3 | OFFSIDER | OFFS + [R]IDER |
| 4 | RETE | (l)ET[T]ER < |
| 6 | OPE(RATIO)N | ERA in OPTION |
| 7 | URNED | U + (DEN[A]RII − II) < |
| 8 | LISPER | IS in PER[I]L * |
| 9 | DISTAL | D + I[N]STAL |
| 11 | REHIRED | H[E]IR in REED |
| 12 | OPERA | P in O[V]ER + A |
| 14 | CARER | CARE[E]R |
| 18 | AMETHYST | ST in (THE MA[N]Y) * |
| 19 | HESSIAN | HESS + I + [T]AN |
| 21 | MAN UP | [S]UN < in MAP |
| 23 | SATURN | S[C]AT + URN |
| 24 | ABUKIR | AB + (l)U(r)[I](d) + KIR |
| 26 | DRAMA | [C]RAM in DA |
| 27 | RECITE | I in [E]RECT + E |
| 29 | UTERI | (o)UTE[R] RI(dings’) |
| 31 | SECT | SEC + T[O] |
| 32 | POS(SUM)S | POS(e) + SUMS |
| 33 | S(AND)PIT | (IN PAST + D) * |