Gradually build up a group of sailors who listen (6)
I believe the answer is:
accrue
'build up a group of sailors who listen' is the definition.
'accrue' can be an answer for 'build up' (I've seen this before). I am unsure of the rest of the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for accrue that I've seen before include "Accumulate or amass like interest" , "Gather" , "(Of a benefit) be received regularly" , "what interest payments do" , "Grow like interest on capital" .)