Collect a working party's report (6)
I believe the answer is:
accrue
'collect' 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 accrue that I've seen before include "Accumulate or grow like interest" , "Build up interest" , "(Of money) be received in increasing amounts" , "Grow or accumulate, say interest" , "Accumulate over time" .)