Teacher has bit of triumph (11)
I believe the answer is:
masterpiece
'triumph' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'teacher has bit' is the wordplay.
'teacher' becomes 'master' (I've seen this before).
'has' is a charade indicator (letters next to each other).
'bit' becomes 'piece' (synonyms).
'master'+'piece'='MASTERPIECE'
'of' is the link.
Can you help me to learn more?
(Other definitions for masterpiece that I've seen before include "tour de force" , "Outstanding artwork" , "Great work" , "Work of outstanding artistry" , "Outstanding item of workmanship" .)