Foolish, like current number of ladies dancing (7)
I believe the answer is:
asinine
'foolish' is the definition.
('asinine' can be similar in meaning to 'foolish')
'like current number of ladies dancing' is the wordplay.
'like' becomes 'as'.
'current' becomes 'i' (symbol for electric current).
'number of ladies dancing' becomes 'nine' (I am not sure about this - if you are sure you should believe this answer much more).
'as'+'i'+'nine'='ASININE'
Can you help me to learn more?
(Other definitions for asinine that I've seen before include "simple" , "Silly like a donkey" , "Is Annie? (Anag)" , "Foolish like donkey" , "Absurd" .)