Act ruins play changing one's view of Rear Window perhaps (8)

I believe the answer is:

curtains

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'changing one's view of rear window perhaps' is the definition.
I can't judge whether this defines the answer.

'act ruins play' is the wordplay.
'play' indicates an anagram.
'act'+'ruins'='actruins'
'actruins' with letters rearranged gives 'CURTAINS'.

Can you help me to learn more?

(Other definitions for curtains that I've seen before include "Hanging cloths" , "Death (slang)" , "I run cats up the drapes" , "Window coverings" , "Hanging drapes" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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