UB20k - How bad did I play this AK?

[petvan]

Down to 18 from 210 on the 20k at UB tonight.

I've been top 3 or so for most of the tourney, and likley seen as pretty tight if I have any image at all. Just had KK busted by AQo 4-5 hands ago for 1/3 of my stack, but I'm still top 6 or so with 40k, blinds at 600/1200, ante 100 or so.

I am second to act and 3X with AKo, big stack in SB and one other guy covering me both yet to act. Other guy covering me bumps my 3600 to 10.5k out of his 45k stack and everyone folds to me.

I go in the tank a bit, think a lot about a fold, then think folding would be too weak, so I call. I'm nervous about KK/AA here, but thinking he might make that move with QQ/JJ or AK/AQ as well. Maybe even weaker if he'd seen me fold to a couple reraises.

Flop is Q rag rag. I check, he checks. River is A putting two clubs on board and giving me TPTK obviously. I check, he raises about 5k. I push here hoping I've just found AJ, or KQs etc probing.

In hindsight, I think this is WAWB and I should try and call this down, but in general, I'm not sure the line here. Somehow expecting many to say push preflop.

Anyone give me some ideas? What do you put villian on?

Thanks

P