Shifted, and not for the first time? (7)
I believe the answer is:
removed
'shifted' is the definition.
(removing is a kind of shifting)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for removed that I've seen before include "Got rid of" , "Having made a withdrawal" , "Withdrawn" , "Took away" , "Taken away" .)