Collecting large screen (8)
I believe the answer is:
hoarding
This might be a double definition.
'collecting large' is the first definition.
'hoarding' can be an answer for 'collecting' ('hoard' can be a synonym of 'collect'). I am unsure of the 'large' bit.
'screen' is the second definition.
(I have seen 'screen of boards' mean 'hoarding' so perhaps 'screen' could also mean 'hoarding')
Can you help me to learn more?
(Other definitions for hoarding that I've seen before include "space for posters here?" , "wooden fence" , "Board for ads" , "Collecting and keeping - large board for advertising" , "Setting great store" .)