There are 47 five-letter words beginning in T <blank> U that could be found across two large dictionaries. If there is a word like that, with that definition, it'll be here, although I don't know which it is:
Uvilla is a fruit. It begins with the letter u.
Uvilla is a fruit. Ugli fruit is a type of fruit.
A fruit beginning with the letter k is kiwi, while a vegetable is kohlrabi, a type of German turnip.
There is only one fruit that starts with the letter U. That fruit is called the ugli fruit. It is similar to a grapefruit.
There is a fruit called "quince".
There is only one fruit that starts with the letter H. That fruit is the hawthorn fruit. This fruit is a reddish color and grows on a bush in bundles.
Ugli Fruit (yes, really!)
yes, there is a fruit called quinces.
Watermelon is a fruit. Watercress is a vegetable.
Dates and Dewberrys