Watch the dance in which one has a pupil (7)
I believe the answer is:
'watch the dance in which one has a pupil' is the definition.
'eyeball' can be an answer for 'watch' (I've seen this before). I'm unsure of the remainder of the definition.
'watch the dance' is the wordplay.
'watch' becomes 'eye' (I've seen this in another clue).
'the dance' becomes 'ball' (ball is a kind of dance).
Can you help me to learn more?
(Other definitions for eyeball that I've seen before include "not exact" , "Label ye (anag)" , "Stare at closely; organ" , "" - to - " = in close confrontation" , "Confront (_____ to _____)" .)