Fracture that's the same! (4)
I believe the answer is:
snap
I believe this clue is a double definition.
'fracture' is the first definition.
(thesaurus)
'that's the same' is the second definition.
(as in the card game)
(Other definitions for snap that I've seen before include "Spell of cold weather and card game" , "Sudden break" , "Break suddenly with cracking sound" , "Picture" , "Break sharply like dried twig" .)