Build up a sound team of workers (6)
I believe the answer is:
accrue
'build up' is the definition.
(I've seen this before)
I cannot 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 over time" , "Gather" , "(Of money) build up in regular amounts" , "Show increasing interest" , "(Of money) build up by regular receipts" .)