Soak daughter next to ditch, topless (6)
I believe the answer is:
drench
'soak' is the definition.
(I know that soak can be written as drench)
'daughter next to ditch topless' is the wordplay.
'daughter next' becomes 'd' (I can't explain this - if you can you should believe this answer much more).
'to ditch' becomes 'trench' ('trench' can be a synonym of 'ditch').
'topless' means to remove the first letter.
'trench' with its first letter taken away is 'rench'.
'd'+'rench'='DRENCH'
Can you help me to learn more?
(Other definitions for drench that I've seen before include "Soak, souse" , "Soak, douse" , "Soak or saturate" , "Swamp" , "draught?" .)