Fungus spots kid sealed over dunny (9)
I believe the answer is:
toadstool
'fungus' is the definition.
(toadstool is a kind of fungus)
'spots kid sealed over dunny' is the wordplay.
I cannot quite see how this works, but
'spots' could be 'ads' (I've seen this in another clue) and 'ads' is located in the answer.
'kid' could be 'tot' (tot is a kind of kid) and 'tot' is located in the remaining letters.
'over' could be 'o' (cricket abbreviation) and 'o' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for toadstool that I've seen before include "Something poisonous" , "Umbrella-shaped cap on a stalk" , "what's poisonous maybe" , "that could be poisonous" , "Plant akin to mushroom" .)