Extreme drama impacts stage (4)
I believe the answer is:
dais
'stage' is the definition.
(type of platform or stage)
'extreme drama impacts' is the wordplay.
'extreme' says to hollow out the word (remove centre letters).
'impacts' becomes 'is' (I can't justify this - if you can you should give a lot more credence to this answer).
'drama' with its centre removed is 'da'.
'da'+'is'='DAIS'
Can you help me to learn more?
(Other definitions for dais that I've seen before include "stage" , "stands on this?" , "Piece of old cloth" , "stepping up here?" , "device to give some an uplift at conference?" .)