Glass shattered in vertiginous building? (5)
I believe the answer is:
shard
I believe this is a double definition.
'glass shattered' is the first definition.
'vertiginous building?' is the second definition.
(London skyscraper)
'in' acts as a link.
(Other definitions for shard that I've seen before include "construction in London" , "Sliver of glass, etc" , "Broken fragment" , "Broken bit" , "Scrap of pottery" .)