Had been picked up, one gathered (9)
I believe the answer is:
collected
'one gathered' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for collected that I've seen before include "composed" , "Gathered" , "Also cool and calm?" , "Came together" , "Brought together" .)