Covered entrance to a building (7)
I believe the answer is:
portico
'covered entrance to a building' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for portico that I've seen before include "building construction" , "series of columns" , "Roofed porch" , "Porch-like structure with columns" , "covered area" .)