Unlock again (6)
I believe the answer is:
reopen
(Other definitions for reopen that I've seen before include "Begin again" , "Unlock or admit customers again" , "Resume investigation or unlock again" , "Unlock door - again" , "Start again" .)
I believe the answer is:
reopen
(Other definitions for reopen that I've seen before include "Begin again" , "Unlock or admit customers again" , "Resume investigation or unlock again" , "Unlock door - again" , "Start again" .)