Stupid, like one consorting with number of Muses? (7)
I believe the answer is:
asinine
'stupid' is the definition.
(I've seen this in another clue)
'like one consorting with number of muses?' is the wordplay.
'like' becomes 'as'.
'one consorting with' becomes 'i' (I can't justify this - if you can you should believe this answer much more).
'number of muses?' becomes 'nine' (I've seen this in another clue).
'as'+'i'+'nine'='ASININE'
Can you help me to learn more?
(Other definitions for asinine that I've seen before include "Donkey-like" , "Silly like a donkey" , "Is Annie? (Anag)" , "Extremely stupid or foolish" , "simple" .)