Covered entrance I start to construct in Iberian city (7)
I believe the answer is:
Here is my best explanation:
'covered entrance' is the definition.
(I've seen this before)
'i start to construct in iberian city' is the wordplay.
'start to' says to take the initial letters.
'in' indicates putting letters inside.
'iberian city' becomes 'porto' (Portuguese city**).
The first letter of 'construct' is 'c'.
'ic' placed into 'porto' is 'PORTICO'.
(Other definitions for portico that I've seen before include "Covered entrance to a building", "Covered walkway", "series of columns", "Grand porch", "gallery, perhaps", "Porch with columns", "Posh covered entrance to building", "Covered porch with supporting columns", "Colonnade, covered porch" and "Grand entrance".)