As mentioned by tuber below, 9D and 11D are considered unfair since they are indirect anagrams. I wasn't sure what that meant at first, I'm still learning!
Orcas, etc. (WHALES), so to speak (WAILS) -> YELLS. I think "SPEAK" was meant to also be the definition, but the tense is wrong, oops...
11D Have (definition) new (scrambled) present (synonym of now)
A curate's egg!
Some very entertaining clues, but I had problems with:
4A Horrid, horrid, horrid!
11D If an anagram of "now" is required, it cannot be the letters of a synonym.
13A I don't believe that acronyms belong in crosswords.
8D US spelling; UK solver.
9D I am totally mystified! Please parse this clue.
I do not intend these comments as criticism.
I like your review of OWN and YELLS.
I'm still being nit-picky about USOFA.
If you change 4A to FLING, 3D could be IMOLA, a motor racing track. "I'm first on Los Angeles race track" for example.
This is just a suggestion to avoid the pseudo-acronym.
Hey Elle, I always look forward to your puzzles, so well done for taking the plunge into cryptic territory.
9D is really tough: the idea is "a synonym of a homophone of WHALES", but this is too indirect to be allowed in cryptic-land. Similarly, 11D is a so-called indirect anagram: "anagram of a synonym of present". These are considered unfair on the solver and so you won't come across them in cryptic crosswords.
But I was able to get everything and only had to guess at 9D, so good job and I hope to see more