Disasters Emergency Committee speaker is one who chooses papers (9)
I believe the answer is:
decorator
'one who chooses papers' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'disasters emergency committee speaker' is the wordplay.
I cannot really understand how this works, but
'speaker' could be 'orator' (orator is a kind of speaker) and 'orator' is present in the answer.
The remaining letters 'dec' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'is' acts as a link.
Can you help me to learn more?
(Other definitions for decorator that I've seen before include "Worker embellishing a property" , "One doing up a house or room" , "Who paints" , "chap giving medals?" , "Painter, wallpaper hanger" .)