12ac Cylindrical part of a hinge through which the pin passes. [k?????e] 33ac George (1739-1812), vice president of US under Thomas Jefferson andJames Madison. [C??n???] 36ac Ratio of the hypotenuse to the opposite side of a right-angled triangle; the reciprocal of sine. [??s??v?t] 15ac Large detached piece of an iceberg io glacier. [ca?f]
Number of letters required in the answer helps a great deal, just in case you have the wrong number of ? or *....
The search function is good, too....
15a Calf (already asked and answered)
36a Cosecant (already asked and answered)
33a Clinton (took under 1/4 second on Google)
12a Knuckle (already asked and answered)