Want to chuck teacher in river? (6)
I believe the answer is:
desire
'want' is the definition.
(I know that want can be written as desire)
'teacher in river?' is the wordplay.
'teacher' becomes 'sir' (way of addressing a male teacher).
'in' indicates putting letters inside.
'river?' becomes 'Dee' (River Dee).
'sir' placed inside 'dee' is 'DESIRE'.
'to chuck' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for desire that I've seen before include "Long for (something)" , "Lust" , "Concupiscence" , "Reside (anag.)" , "Want to reside?" .)