Tart fruits are a type of fruit that have a sour or acidic taste. The crossword solutions for the term 'tart fruit' include sloes (5 letters), SLOE (4 letters), LEMON (5 letters), LIME (4 letters), quinces (7 letters), and crabapple (9 letters). Sloes are small, dark blue fruits that grow on blackthorn trees. SLOE is another name for the same fruit. Lemons are yellow citrus fruits with a sour taste. Limes are similar to lemons but are smaller and have a more intense flavor. Quinces are yellow-green fruits that have a tart flavor and a hard texture. Crabapples are small, tart apples that are often used in jams and jellies.