Furnishings, etc., giving dramatic effect (5)
I believe the answer is:
decor
'furnishings' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for decor that I've seen before include "ornament" , "Colour-scheme etc of a room" , "Choice of colour" , "Furnishings and colours of a room" , "Interior design; stage scenery" .)