Question to more experienced cryptic constructors: In 11A, is it OK to put an exclamation mark at the end of the clue? In an American crossword, I could clue [That takes me back!] TIMETRAVEL, but "!" in a cryptic means something else.
The answer is maybe: In UK-style cryptics (like what you've made here), constructors can play it loosey-goosey with punctuation in service of clue surface, whereas US constructors have historically reserved exclamation points as indicators of &lit clues (although this approach seems to be relaxing). In the end, it's up to you and your own personal style!