it's this craving for existence, non-existance and sensual pleasure which leads to dukkha.
together with the six sense base and ignorance there can be the three kinds of craving.
when there is craving there is clinging. when there is clinging there is being. with being there is birth and the whole mass of suffering.
maybe you like this simile:
MN105 wrote:'Craving is said by the Buddha to be an arrow'. The poison of ignorance spreads its toxin through desire, passion, & ill will. [...]
I have given this simile to convey a meaning. The meaning is this: the wound stands for the six internal sense media; the poison, for ignorance; the arrow, for craving...
so like the arrow, poison and wound together compose suffering it is craving, ignorance and the six sense base which lead to suffering.
not exactly what you are searching for but maybe close to it...
best wishes, acinteyyo