Had been cut up (3)
I believe the answer is:
was
'had been' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for was that I've seen before include "Used to be" , "Is no longer" , "(I/he/she/it) existed" , "(He/she/it) existed" , "Did live" .)