Okay, thank you. So it is a clue after all. 
… in not-quite alphabetical order, dammit.
AACD FIII ILNO QSTU
Disqualification, I believe? Your fear was unfounded 
.
How about:
BCCDEEIILNOORUXY
Is there a gene for aptitude at word puzzles?
It must be … deoxyribonucleic
I’ll assume that’s right - it’s hard to believe there could be another word that fits. So:
AACC DIII NNNO ORTT
Hint: It’s something telling you that you really shouldn’t do that thing.
As in “I was wondering if ‘contradiction’ was the word, but the fact that it was only 13 letters was a contraindication?” 
ACEHHIOPPRSSSTTY
Great people, despite the horrible criminals hidden in their name
It is indeed correct - did you not see my clue that confirms it? Or was it too cryptic?
Not cryptic at all. I figured it out because of the clue - I immediately thought “DNA, and the first word has b and x and y … how is that spelled again?” then found it and knew I had it.
I think it is psychotherapists.
So, I’ll just post the letters of the next word to guess:
AACE EIIN OOPP RRTV
The clue is the usual square formation:
| A | T | I | N |
| I | E | O | O |
| C | V | R | P |
| E | R | A | P |
Like before, my clue is to present the letters in a Wordament-like square, where you can collect a word by placing your finger on the first letter of the word and then dragging to each adjacent letter until you’ve completed the word.
Question: are the first four letters “over” and if the answer is no, are the last 6 letters “iation”?
The answer is yes to both question, so you get: over _ _ _ _ _ _ iation.
overappreciation?
Of course. I guess it is your turn now. 
ABDD EEEI MNNN SSST
Hint: Because of this, I almost forgot to give you a clue.
I think it is absentmindedness.
That was quick! Your turn.
All right, thank you. Let me think for a minute.
(I’ll have to work on my square too… )
The new word includes the following letters:
CEEH ILMN NOOP STTU
This is the clue (again).
| M | I | P | E |
| U | H | N | S |
| O | L | E | C |
| O | T | T | N |
Like before, my clue is to present the letters in a Wordament-like square, where you can collect a word by placing your finger on the first letter of the word and then dragging to each adjacent letter until you’ve completed the word.
photoluminescent!
ACII LMNN NOOO RSUY
Hint: How they spoke when they stopped being angry.
I’ve just seen the new word now and the clue makes me think of conciliatory or maybe conciliatorily, but it must be something else. I’ll think of it tomorrow (it’s 11 pm here). Good luck everyone.