| SOFFIT | Backing provided inside relatively unprotected underside of an architectural structure (6) |
| RESEARCH | Systematic investigation concerning an architectural structure outside the London area (8) |
| BOTTOM | Underside of an object (6) |
| BRIDGE | Architectural structure whose arch/arches, in older examples, can be used to roughly identify the date of said causeway's construction (6) |
| FIASCO | Backing provided when firm's a failure |
| VERIFY | Confirm priest's backing provided to youth leader |
| COLUMN | An architectural support such as a pillar; a regular article, piece or section in a newspaper; an upright mass of air, smoke, water etc; or, a vertical division of a page/table (6) |
| SPIRES | Architectural structures |
| ASPECT | A classical glance or Latin look that became an architectural outlook, a garden's direction, a personal angle, point of view or planetary alignment (6) |
| ASPIRE | Long to have an architectural feature (6) |
| RIB | Word for a thoracic costa that, by extension, describes one of the liernes separating the webs of an architectural vault; an umbrella spoke; or, a stick of celery (3) |
| PILLAR | An architectural column (6) |
| FRIEZE | Heavy fabric that can be used for an architectural feature |
| NECK | Gorgerin of an architectural capital; or, part of the body for a bow tie, cravat, jampot, ruff or stock (4) |
| IONIA | Ancient region where the style of an architectural column originated |
| FITWRIGHTIN | Advice to see Fallingwater as part of an architectural tour? |
| TUGU | From Latin for "pipe", a shaft or trunk of an architectural column (4) |
| IONIC | One icon of an architectural style |
| ALP | High point of an architectural plan |
| VENTRAL | On the underside of an animal or plant |
