Hmm, AKo at a tight table

[themflags]

Checkraise sounds good here. It's possible he's got KQ, but you take your chances. His VPIP is tight, but not so tight that he will not play other hands besides KQ. At this point, since you have not demonstrated a lot of aggression, he probably thinks you flopped top pair or are drawing to a flush or straight, and since you probably didn't get it, he's using his aggression to take you out.