Large amount of water studied, we hear, hit the roof? (3,3)
I believe the answer is:
see red
'hit the roof?' is the definition.
(both can mean to become very angry)
'large amount of water studied we hear' is the wordplay.
'large amount of water' becomes 'see' (I can't justify this - if you can you should give a lot more credence to this answer).
'studied' becomes 'read' (I've seen this in other clues).
'we hear' indicates a 'sounds like' (homophone) clue.
'read' is a homophone of 'red'.
'see'+'red'='SEE RED'
Can you help me to learn more?
(Other definitions for see red that I've seen before include "blow a gasket" , "Lose temper colourfully, as bull does (3.3)" , "Lose temper as bull might" , "Become suddenly angry" , "Lose temper like enraged bull" .)