| NECESSITY | Mother of invention, and sense City made of it (9) |
| CHESTERTHOMPSON | American drummer who performed with Frank Zappa and the Mothers of Invention, and Genesis (7,8) |
| TYRE | Ancient city (made of rubber?) (4) |
| RUNINTO | I turn on invention and collide with it (3,4) |
| PURLIEU | Nearly 100 per cent is an invention and primarily used around the houses (7) |
| UNCLEMEAT | 1969 Frank Zappa and the Mothers of Invention double album |
| LEICESTER | City made to look bad by secret lie (9) |
| AMSTERDAM | Dutch city made smart somehow (9) |
| SMELLARAT | Be suspicious and sense a traitor |
| PRACTICAL | Capital RC made of it, and it can be done (9) |
| REFERENCE | Mention may be made of it at the interview (9) |
| ERRONEOUS | Is mistaken as to Nero, or use made of it (9) |
| TIDETABLE | Bet detail could be made of it showing springs and neaps (4-5) |
| PANATELLA | Having a plan, let a cigar be made of it (9) |
| NONENTITY | A no-account tinny tone made of it (9) |
| TAMPERING | Meddling with game, print is made of it (9) |
| MISSPELLS | Spill mess made of it if one gets the orthography wrong (9) |
| GONETOFAT | Gets to be corpulent, for taunts to be made of it (4,2,3) |
| UNCLE | "If necessity is the mother of invention, urgency is the of change": Nell Scovell (5) |
| ZAPPA | Frank ___,guitarist and singer whose band was called The Mothers Of Invention (5) |
