Drawbacks of cascade in the wake of mine (8)
I believe the answer is:
pitfalls
'drawbacks' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how they can define each other.
'cascade in the wake of mine' is the wordplay.
'cascade' becomes 'fall' (I have seen 'Cascade of water ' mean 'fall' so perhaps 'cascade' could also mean 'fall').
'in the' means one lot of letters goes inside another.
'wake of mine' becomes 'pits' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'fall' put into 'pits' is 'PITFALLS'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for pitfalls that I've seen before include "Lifts pal from unexpected difficulties or dangers" , "Catches" , "Hidden dangers, booby traps." , "Unsuspected dangers or difficulties - for miners?" .)