Most wobbly toilet's position with lid down (7)
I believe the answer is:
loosest
'position with lid down' is the definition.
I can't judge whether this definition defines the answer.
'most wobbly toilet's' is the wordplay.
'most' means to remove the last letter.
'wobbly' becomes 'loose' (I've seen this before).
'toilet's' becomes 'est' (I am not sure about this - if you are sure you should believe this answer much more).
'loose' with its last letter taken away is 'loos'.
'loos'+'est'='LOOSEST'
Can you help me to learn more?
(Other definitions for loosest that I've seen before include "most relaxed" , "most unstable" .)