Spilled coffee on my puzzle

Question

Some time ago I created a nice simple puzzle. It's a horizontal word grid with 22 letters and nine clues. However, I spilled some coffee on my notes and can no longer remember what numbers I wanted to put in clues 1 and 4. Can you help me out?

1. (illegible) in hexadecimal
2. furry red monster
3. musical cookware
4. (illegible) in hexadecimal
5. software documentation
6. romance water
7. something with quiero
8. female relative
9. megacity

Answer 1

The missing clues are

1. 11 in hexadecimal
4. 10 in hexadecimal

After filling the rest of the clues (and figuring out better words for 5, 6, and 9 particularly), you get

If you now fill in the mystery clues, you get

Which finally fits the somewhat surprising tags by listing

overlapping Middle American capital cities.

Particularly, the ones listed are

* Belmopan, the capital of Belize
* Panama, the capital of Panama
* Managua, the capital of Nicaragua, and
* Guatemala, the capital of Guatemala

Answer 2

Clues:

(illegible) in hexadecimal - E (a guess, as Hex characters are A-F)
furry red monster - ELMO
musical cookware - PAN
(illegible) in hexadecimal - D (a guess, as above)
software documentation - DOC (As in .doc)
romance water - TORA?? (Can only think of The Shape of Water although that's Del Toro)
something with quiero - TE ("te quiero", Spanish for "I love you")
female relative - MA (short for Mother)
megacity - NY (New York)

Which can also be broken to read as:

EEL MOP AND DOCTORATE MANY

So your missing letters are:

E and D

Answer 3

Are the missing answers:

E and D

And therefore the clues:

"14 in hex" and "13 in hex"

Reasoning:

I only solved half the clues, but got ELMO for clue 2, and PAN for clue 3.
When I put them together I noticed that the word MOP was created in between them.
I assumed the single digit of hex would be a letter to match the rest, and so that limited me to A through F.
I therefore deduced that the first letter would combine with the first few letters of ELMO, and therefor would be E to create EEL.
And also that the last letters of PAN would form another word with the answer to clue 4, and in choosing D, they make AND. I assume there is a similar connection between the other words, but I haven't figured them out yet apart from:

Reasoning continued: (Edited to include @Astralbee 's solutions, credit to them)

5 being DOC (.doc) 6 being TORO (for Guillermo Del Toro, creater of The Shape of Water)
7 being TE (te quiero being a spanish phrase "I Love You")
8 being MA (term for mother)
9 perhaps being NY for New York
This creates the whole line EELMOPANDDOCTOROTEMANY which contains the following words:
EEL, ELMO, MOP, PAN, AND, DOC, OCTO, DOCTOR, ROT, TEMA (a city in Ghana), MANY, and ANY.