Why does an complete molar pregnancy not result in a clone?
"However if the sperm has X chromosome the embryo will survive to have the 46 XX karyotype and will start to grow as molar pregnancy."


Complete molar pregnancy is diploid, and there is no fetal tissue identifiable. It is a disease of the placenta, a uterine tumor (cancerous in some cases, non-cancerous in others); fetuses do not develop from such pregnancies, not haploid or diploid (though they are usually 46, XX). A male haploid 23,X replicates, but only trophoblastic (what should be the placenta) tissue results.

Partial molar pregnancies are triploid, and a fetus can sometimes be identified. However, it is non-viable, as polyploidy is non-viable in humans. Even if it were, the abnormal placenta could not support it.

Molar Pregnancy
p57KIP2 immunohistochemistry in early molar pregnancies: emphasis on its complementary role in the differential diagnosis of hydropic abortuses