Doctor again designed procedure ultimately finding means of discharging liquid waste (8)
I believe the answer is:
drainage
'means of discharging liquid waste' is the definition.
I can't judge whether this definition defines the answer.
'doctor again designed procedure ultimately' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'designed' indicates anagramming the letters (designed with the letters).
'ultimately' says to take the final letters.
The final letter of 'procedure' is 'e'.
'again' is an anagram of 'ainag'.
'dr'+'ainag'+'e'='DRAINAGE'
'finding' is the link.
Can you help me to learn more?
(Other definitions for drainage that I've seen before include "Water removal system" , "Removal of waste water" , "Evacuation -- gardenia (anag)" , "Facility for water removal" , "Disposal of waste water" .)