Flowers finally waste water around middle of grounds (8)

'flowers finally waste water around middle of grounds' is the definition.
I can't tell whether this defines the answer.

'finally waste water around middle of grounds' is the wordplay.
'finally waste' becomes 'ice' (I can't justify this - if you can you should give a lot more credence to this answer).
'water' becomes 'hose' (water a flowerbed say).
'around' means one lot of letters goes inside another.
'middle of' means to look at the middle letters.
The middle letter of 'grounds' is 'u'.
'hose' placed around 'u' is 'house'.
'ice'+'house'='ICEHOUSE'

Can you help me to learn more?