Records omitting Brunel's section of bridge, perhaps (4)
I believe the answer is:
arch
'section of bridge perhaps' is the definition.
(a bridge's structure may include an arch)
I don't understand how the rest of the clue works.
(Other definitions for arch that I've seen before include "architectural feature" , "Bend into upward curve" , "Roguish - superior" , "Masonry construction for spanning an opening" , "Cunning; span" .)