I knew the architectural term "clerestory'....
"Main Entry:
clere·sto·ry
Variant(s):
also clear·story \ˈklir-ˌstȯr-ē, -st(ə-)rē\
Function:
noun
Etymology:
Middle English, from clere clear + story
Date:
15th century
1 : an outside wall of a room or building that rises above an adjoining roof and contains windows"
I was hoping (she says, plaintively) that 'clere' might just qualify as a word in its own right. Sadly, I was wrong. It's all right, Alan, I wasn't about to beg for an inclusion of 'clere'......I just wanted to share my pain. :'(