| PRIMENUMBERS | Integers such as 23, 29, 31, 37, etc (5, 7) |
| GLASSBLOWING | Art of making bottles etc (5-7) |
| PRIMENUMBER | Integer such as 5 or 7 (5,6) |
| AMPHIBIANS | Such as 23 ac, 7 dn, 8 dn |
| CORNISHMAN | Monarch frantically restricting rise of evil, such as 23? So some claim (10) |
| PRIME | Number such as 23, 109 or 227 |
| GILLIANFLYNN | Author who wrote the novels from which 17-Across and 29-/31-Across were adapted: 2 wds. |
| REFORMATION | Movement sparked by 29-/31-Across that led to Protestantism |
| INDULGENCES | Payments allowing Catholics to buy their absolution from sin, which 29-/31-Across denounced |
| WHOLENUMBERS | Integers (5,7) |
| ROUNDNUMBERS | Integers that are easy to multiply or divide |
| NUMBERTHEORY | Study of integers and their properties |
| ASPIRATIONAL | Hoping to get a small ratio using integers (12) |
| EUROPE | University line supporting English location of 2, 5, 6, 7, 17A, 17D, 23, 29 and 30 (6) |
| MIAOWED | Was catty, as 23 10 in arrears with child maintenance? (7) |
| PURSUIT | Hobby as 23 12's of 6 (7) |
| CONSPIRACY | Studies theft as 23 to account for misfortune or ... (10) |
| PIGEON | Hog a lot of time as 23 (6) |
| FULLOFBEANS | In high spirits, as 23 may be |
| COHABITATE | How two halves would share quarters, as 23 would do? (10) |
