
1) Apple tree 2) Crab apple 3) Cultivated crab apple 4) Fruit in tart jelly 5) Grumpy flowering tree 6) Jelly source 7) Small fruit high in pectin 8) Small sour apple 9) Small sour fruit 10) Sour fruit 11) Suitable for preserving 12) Suitable fruit for Scrooge 13) Tart fruit
Found on
https://www.crosswordclues.com/clue/crabapple

A small, red apple with a hard, extremely tart flesh. Used in jellies and jams, but are generally too tart for eating out-of-hand.
Found on
http://www.encyclo.co.uk/local/21173

A small, red apple with a hard, extremely tart flesh. Used in jellies and jams, but are generally too tart for eating out-of-hand.
Found on
http://www.encyclo.co.uk/local/21400
noun any of numerous varieties of crab apples cultivated for their small acid (usually bright red) fruit used for preserving or as ornamentals for their blossoms
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.