| NUMBERCRUNCHING | Carrying out large quantities of complex calculations (6-9) |
| NATIONALLIBRARY | Brain rationally sorted out huge bookstore (8,7) |
| COMPUTER | Machine for carrying out complex calculations (8) |
| LEPTON | Former monetary unit of Greece, used only in calculations (6) |
| ABACUS | A simple device for making arithmetic calculations (6) |
| METRIC | Decimal used in some tricky calculations (6) |
| ALGEBRA | Brainiac originally getting stuck into a large, complex calculation (7) |
| HECTOLITRES | Out of the closet, I request to start large quantities of drink (11) |
| RASCAL | Someone unscrupulous, in Cleopatra's calculation (6) |
| RECKON | To establish by calculation (6) |
| DUNCESCAP | Unwanted topping of vitamin! Uncle's spitting out large coffee (6,3) |
| TANKER | A very large ship for transporting large quantities of gas or liquid, especially oil (6) |
| GROCER | Word for a wholesaler dealing in large quantities of dried fruits, spices, sugar etc originally, now a purveyor of food and general household goods, aka a victualler or shopkeeper (6) |
| ASSAM | A state of Northeast India which produces large quantities of tea (5) |
| MASSES | Large quantities of church services? (6) |
| BALES | Opening of big sale shifted large quantities of goods (5) |
| LOADS | Large quantities of an article possibly sold out (5) |
| SPEWED | Expelled large quantities of (something) rapidly and forcibly (6) |
| REFECTION | Thought to take out large meal (9) |
| SPRAWL | Spread out large buckles from right to left (6) |
