Puts up secret amendments (6)
I believe the answer is:
erects
'puts up' is the definition.
('erect' can be a synonym of 'put up')
'secret amendments' is the wordplay.
'amendments' is an anagram indicator.
'secret' with letters rearranged gives 'ERECTS'.
(Other definitions for erects that I've seen before include "Secret (anag.)" , "Put up, builds" , "Constructs, puts up" , "Builds, constructs" , "Sets up or builds." .)