Question asked after second demonstration (4)
I believe the answer is:
show
'demonstration' is the definition.
(I know that show is a type of demonstration)
'question asked after second' is the wordplay.
'question asked' becomes 'how' (how is a question word).
'after' is a charade indicator (letters next to each other).
'second' becomes 's' (common abbreviation).
'how' after 's' is 'SHOW'.
(Other definitions for show that I've seen before include "Portray" , "Demonstrate or reveal" , "Demonstrate; spectacle" , "Demonstration" , "Demonstrate - parade" .)