City overturns objection to water container (7)
I believe the answer is:
bathtub
'water container' is the definition.
'bathtub' can be an answer for 'container' (bathtub is a kind of container). I am not certain of the 'water' bit.
'city overturns objection' is the wordplay.
'city' becomes 'bath' (English city).
'overturns' says the letters should be written in reverse.
'objection' becomes 'but' (as in 'no ifs, no buts').
'but' backwards is 'tub'.
'bath'+'tub'='BATHTUB'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for bathtub that I've seen before include "Soaking receptacle" , "Vessel for ablutions" , "washer" , "Need this to be clean" , "Large vessel" .)