Backdrops and every last screen are remade (7)
I believe the answer is:
scenery
'backdrops and' is the definition.
I can't judge whether this definition defines the answer.
'every last screen are remade' is the wordplay.
'last' indicates one should take the final letters.
'are remade' indicates anagramming the letters.
The final letter of 'every' is 'y'.
'y'+'screen'='yscreen'
'yscreen' with letters rearranged gives 'SCENERY'.
Can you help me to learn more?
(Other definitions for scenery that I've seen before include "Stage backdrop, perhaps" , "Stage background" , "Picturesque view or stage dicor" , "view in the country" , "Pleasant vista or play backdrop" .)