Build Crete assembly (5)
I believe the answer is:
erect
'build' is the definition.
(erecting is a kind of building)
'crete assembly' is the wordplay.
'assembly' indicates anagramming the letters.
'crete' with letters rearranged gives 'ERECT'.
(Other definitions for erect that I've seen before include "Build - straight up" , "Found" , "Construct - perpendicular" , "Build, set up" , "Build, upright" .)