Put up, build (5)
I believe the answer is:
erect
This clue is a double definition.
'put up' is the first definition.
(I know that put up can be written as erect)
'build' is the second definition.
(I know this)
(Other definitions for erect that I've seen before include "Build - straight up" , "Construct, build" , "Unbowed" , "Construct - perpendicular" , "Upright; construct" .)