Final parts in completion on one new German school (7)
I believe the answer is:
endings
'final parts' is the definition.
(I've seen this before)
'completion on one new german school' is the wordplay.
'completion' becomes 'end' (I've seen this before).
'on' says to put letters next to each other.
'one' becomes 'i' (Roman numeral).
'new german school' becomes 'ngs' (this might be a standard abbreviation I've not previously seen).
'end'+'i'+'ngs'='ENDINGS'
'in' is the link.
Can you help me to learn more?
(Other definitions for endings that I've seen before include "Closures" , "Closings, terminations" , "Denouements" , "Final parts" , "Suffixes" .)