alwayspuzzled, Ithink I can help with the following:
18d is 'EARN' from 'NR' (near) 'A'(american) and 'E' (base) inverted.
27d is 'CHI'(female gypsy) , 'A'(advanced) about 'ASM'
39d Irregular projection is a 'CAM'
Sorry can't help with the others as I'm struggling with quite a few others myself! 30,33,37 down and 38,42,43 and 44 across. 3D is a complete mystery to me , I have 'SMNM?N? Clashes there obviously!