Domination by a schoolteacher? (7)
I believe the answer is:
mastery
This could be a double definition.
'domination' is the first definition.
(I know that mastery is a type of domination)
'a schoolteacher?' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for mastery that I've seen before include "Expert skill" , "Grasp" , "Supremacy" , "Total control" , "in full command" .)