Mix and concrete in order to build (5)
I believe the answer is:
erect
'build' is the definition.
(I know that erect is a kind of build)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for erect that I've seen before include "Standing straight" , "Upright; construct" , "Standing vertically" , "Crete (anag)" , "Construct, build" .)