Having trouble parsing these, help appreciated....
11a God! Writer has lost one lot of gold (4) - THOR (God)
I thought it might be 'Writer' = THOREAU minus 'Gold' = AU but that leaves an E so I think I've gone wrong somewhere.
8d Size of boarding house at first obscured by dark (9) - DIMENSION (Size)
27a Prepare to sleep in wooden seat (6) - SETTEE/SETTLE ?