A nickname for Manchester CT. At one point this nickname was applicable. However in the last few decades the minority population in the 06040 has skyrocketed and thus the name "Clanchester" is used by out of towners (but not to a resident of Manchester's face as we'd stab 'em) and in reference to the good old days when you could drive down Spruce Street without worrying about getting shot.
Stupid Dude from New Britain: Yo wanna go hang in Clanchester tonight? Shiz is goin' down I here!
Dude from Manchester: I am from there you tard! *STAB*
Dude 1: Man I wish I could walk down spruce street without getting robbed/stabbed/shot/raped.
Dude 2: Well this ain't Clanchester no more!