Widespread hysteria taking over crowd (9)
I believe the answer is:
panoramic
'widespread' is the definition.
(a panorama offers a wide view)
'hysteria taking over crowd' is the wordplay.
'hysteria' becomes 'panic' (hysteria is uncontrollable panic).
'taking' indicates putting letters inside.
'over' becomes 'ora' (I can't explain this - if you can you should believe this answer much more).
'crowd' becomes 'm'.
'ora'+'m'='oram'
'panic' placed around 'oram' is 'PANORAMIC'.
Can you help me to learn more?
(Other definitions for panoramic that I've seen before include "Sweeping" , "all around" , "giving full view" , "Offering all-round views" , "Extensive" .)