Clingstone peaches have a hard, woody seed connected to the inside of the fruit.
From the sfgate.com
As with peaches, nectarines can be white or yellow, and clingstone or freestone.
From the en.wikipedia.org
Next is Trixzie Pixzee peach, a semi-clingstone also with yellow, juicy fruit.
From the citynews.com.au
Because the seed is so difficult to get around, most clingstone peaches are used for canning.
From the sfgate.com
California grows freestone and clingstone peaches.
From the sfgate.com
Peaches are either clingstone or freestone.
From the thestate.com
The pits from freestone peaches are easily separated from the flesh, while pits from clingstone peaches tend to stick to the flesh.
From the newsobserver.com
Another novel and most flavorful fruit that is being introduced commercially this week is a bright yellow clingstone flat peach that Family Tree Farms is marketing as Peach Pie.
From the latimes.com
More examples
Cling: fruit (especially peach) whose flesh adheres strongly to the pit
Clingstone is a house built in 1905 on the Dumplings in Narragansett Bay, near Jamestown, Rhode Island.
A term that refers to a fruit with a pit to which the flesh clings tenaciously. The best known fruits of this type are "cling peaches" or "clingstone peaches." The term with the opposite meaning is "freestone."
Refers to a drupe having a clinging stone, meaning the stone is well attached to the flesh, and cannot easily be removed from it. ...
The flesh of the fruit is adhered to the pit (seed).