PLATO (rev)
Oinking tendency? (8)
PENCHANT (“pen chant” —groan!)
Tarheels distribute meals for someone who wants you. (5, 3)
UNC+LE SAM [anag MEALS]
Initial repetition is only repetition after all (12)
ALLITERATION
(all + iteration)
Find the reason for San Diego quake (8)
DIAGNOSE (anag)
Cellphone store’s namesake sings perfectly (7)
Really? No one?
Ok, here’s another. If no one guesses the first one, I’ll post the answer later today.
Dog to back into itself (4)
Cellphone // store’s namesake / sings perfectly
WAG: Samsung ? Sam’s Club plus the past perfect of sings?
Correct! You got both of them!
The ALLITERATION one is one of my favorite clues from a book of cryptics, but I made the last two up myself. I was a little worried I’d violated some arcane rule and made then unsolvable by true aficionados when no one got then right away! I was rather proud of myself for coming up with them.
It does take getting used to someone’s style. I only do The Nation one these days, but when I used to do both The Nation and Harper’s, I had to reset my brain between puzzles. 
ETA; Sorry, meant to say nice one on the Samsung! I’d been thinking it over for quite a while!
Oh, sorry! I said you got both of them and didn’t even realize you got SAMSUNG and Biotop got TOTO. Good job both of you!
Here’s one I didn’t come up with:
Obscure study about Noah’s boat (6)
DARKEN
D (ARK )EN
×××
Hostel marred the face of Everest (6)
Lhotse (anagram of Hostel, part of Everest range)
Setter gets in aircraft with little money, gets rich (almost) going round the sun (12)
HELIOCENTRIC, though I don’t completely get it. “I” is “setter”?
Play with lacy bra in the center of Brooklyn (7).
Yes. “Setter” usually refers to the person writing the clue, so means “I” or “me”. Except when it means a kind of dog, or the sun…Goddammit, I could have made it: “Setter gets in aircraft with little money, gets rich (almost) going round setter” which would have been a) harder and b) neater.
This is an anagram of lacy bra. I don’t know Brooklyn at all, but some googling suggests there’s a Barclay centre there.
Dub equestrian gallant jumper (5)
Dub equestrian gallant jumper (6)
Because apparently I can’t goddam count.
KNIGHT ? syn. verb and noun?
The seashore is primarily better eats and casual hospitality (5)
I got one! BEACH.
Definition = seashore
primary (initial) letters of “better eats and casual hospitality”
The offspring of Central Intelligence (5)
I want to say SCION but I can’t get there. I’ll tell you what I do get, though: an earworm of “Got run over by a crappy purple Scion”. :mad:
Odds are, I’d sell Ann down in Bermuda (6)
SCION is right. C.I. inside of S O N.