Build Crete badly (5)
I believe the answer is:
erect
'build' is the definition.
(I know that build is a is a more specific form of the action of erect)
'crete badly' is the wordplay.
'badly' indicates an anagram (letters in the wrong order).
'crete' with letters rearranged gives 'ERECT'.
(Other definitions for erect that I've seen before include "Assemble" , "Rigidly upright" , "Not having a list" , "Build, upright" , "Upright or vertical" .)