Dramatic scene of forces off the Beaufort Scale (7)
I believe the answer is:
tableau
'dramatic scene' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tableau that I've seen before include "Group of motionless figures -- dramatic scene" , "Scene represented by motionless figures" , "Figures making a scene" , "A dramatic or picturesque scene, may be still" , "A scene with silent motionless group of people" .)