Fancy shoving teacher into river? (6)

I believe the answer is:

desire

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'fancy' is the definition.
(I know that fancy is a more specific form of the action desire)

'teacher into river?' is the wordplay.
'teacher' becomes 'sir' (a male teacher might be addressed as 'sir').
'into' is an insertion indicator.
'river?' becomes 'Dee' (River Dee).
'sir' put inside 'dee' is 'DESIRE'.

'shoving' acts as a link.
This may not be correct. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for desire that I've seen before include "request" , "Want to reside?" , "Concupiscence" , "Strong wish" , "Strong need" .)

I've seen this clue in The Times.

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