Break or split partially (5)
I believe the answer is:
crack
(Other definitions for crack that I've seen before include "Very skilful" , "Break sharply; a joke" , "Break; gap" , "Opening; sharp blow" , "Go for expert" .)
I believe the answer is:
crack
(Other definitions for crack that I've seen before include "Very skilful" , "Break sharply; a joke" , "Break; gap" , "Opening; sharp blow" , "Go for expert" .)