| ADDENDA | Items forming a supplement |
| BOOK | Each one of a number of items forming a bibliotheca or library (4) |
| POKER | One of the items forming a fireside companion set (5) |
| NEEDLE | Traditionally bought at a haberdashery, an item forming part of an etui or a sewing basket, used with a thimble and thread; a tool for knitting; or, a leaf of a pine tree (6) |
| SHEETS | Expanses of rain, clouds, ice or moving flames; items forming part of a bed's collective linen; geologic sills; or, a poetic word for sails (6) |
| SCONES | Items forming part of a cream tea (6) |
| PIECES | Detached portions; spans of time; sections of armour; firearms; coins; "men" in chess and other games; jigsaw-puzzle shapes or other items forming part of a set/whole; or, people (6) |
| CARDS | Items forming decks or packs (5) |
| PIECE | Item forming part of a set |
| FLAGS | Items forming bunting; the shapes of the tails of retriever and setter breeds; or. yellow irises (5) |
| MIRROR | Item forming an essential part of a heliograph signalling device (6) |
| BEAR | Teddy -; item forming part of a collection donated to Newby Hall by arctophile Gyles Brandreth (4) |
| INSERT | A supplement, often a loose sheet, placed within the folds of a newspaper or periodical (6) |
| CUEBALL | White item forming an essential part of pool or snooker (3,4) |
| CODICIL | A supplement to a will (7) |
| ADDENDUM | A supplement to a book (8) |
| POSTSCRIPT | A supplement added to the completed text of a book (10) |
| INCOME | ____ support, money provided by the state as a supplement to a person's earnings (6) |
| APPEND | To add as a supplement (6) |
| ADDITION | A supplement |
