When a TAG cold-calls out of position...

[ElSapo]

Five-handed game, I raise the CO with A8o. The SB, a good player who knows me as a regular, cold calls.

Heads up.

Flop 996r, and he check-raises ...

He could have a few hands, though most probably beat me. I can't see that I'm ahead here, but his check-raise could mean Ace-high, though if it does it will absolutely be a better ace.

Easy fold? Should I even have bet the flop?