| FEW | Not many, as in the Tanacetum parthenium fever! (3) |
| FEVERFEW | An aromatic bushy plant, Tanacetum parthenium, used to treat migraine |
| SIMILES | Many 'as'-in-middle phrases |
| ALE | Nothing to do with the price of beer, _cost is one of the common names of Tanacetum balsamita, a Eurasian perennial herb with button-like yellow flowers! (3) |
| HAY | 'Town of books' might produce a kind of fever! (3) |
| EVE | That girl's in a fever! She would be first! |
| EGG | The shell of what can have as many as 17,000 pores? (3) |
| ALL | As many as exist (3) |
| IRR | Like many "as is" garments (abbr.) |
| ALECOST | Alternative name for the herbaceous Eurasian plant costmary, classified as Tanacetum balsamita (7) |
| TANSY | Plant such as Tanacetum vulgare formerly used in medicine (5) |
| CHRISCOOPER | "He should star in the movie version of David Sedaris's Barrel Fever!" |
| BUTTONS | 'Bachelor's ___', common name of the wild flower Chrysanthemum parthenium (7) |
| GUAYULE | Bushy shrub of the U.S., Parthenium argentatum, which yields rubber (7) |
| JAUNDICE | Over a month they're rolling and tossing in fever! (8) |
| RHEUMATIC | A twitch comes after watery discharge in this fever! (9) |
| TRAVOLTA | Subject of the 1996 biography "Fever!" |
| DOALLONECAN | Strive to cheat as many as possible (2,3,3,3) |
| RAGWEED | Outside, we raged, 'It causes hay fever!' (7) |
| UPTO | As far as or as many as (2,2) |
