I'd have Clyne over TAA until TAA improves defensively then its a no brainer. Gomez doesn't even come into the equation as he's the worst of the three imo. Im a defense first kind of guy and TAA is nowhere near as good defensively as Clyne right now.
Aside from the WBA game where everyone was horrendous, I don't recall TAA making too many mistakes or being positionally naive. It seems a common misconception based on the fact he's a good attacker. Gomez is the more natural defender but his mistakes have been ridiculously amateurish, by comparison.
I wouldn't argue against the fact that a fully fit Clyne was a better defender - he was more experienced for one, but I don't think TAA is quite as defensively poor as being made out. I don't recall too many goals (or chances) coming down his side of the pitch. Certainly not enough for it to be any particular concern. Gomez had to be taken out the limelight because he WAS making mistakes in nearly every game.
People are judging the experience of a mid 20's International fullback against a kid and surmising that TAA should be at the same level or something. I'm pretty sure Clyne was learning the trade and making the odd error at the same age. In fact, in his last fully fit season he made plenty of mistakes.