I echo Trevor's comments, and add these:
1. the length of the answer helps - you'd be surprised how many times a pattern is given incorrectly
2. dashes are very difficult to count, especially for Trevor and myself
The net result is I often have to cut and paste the question before I can read it properly.
I resubmit your questions, but please make sure I haven't made any mistakes:
"Means of entering hotel after hours (5,3)" N???T ?E??
"Relating to the element with atomic No 52 (9)" ????U???S
"Small liquid capacity (9)" ??T?L?T??
"Not difficult to approach (3,4,2)" A?? ?T?B ??
"The study of hypothetical advancements (10)" F?T?R?R???