Finally, nosh in feeding container finished (7)
I believe the answer is:
through
'finished' is the definition.
(similar in meaning)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for through that I've seen before include "done" , "Non-stop - finished" , "By way of - exhausted" , "having arrived at next stage" , "No longer going out together" .)