Shown to be spread out, indeed (9)
I believe the answer is:
displayed
'shown' is the definition.
('display' can be a synonym of 'show')
'spread out indeed' is the wordplay.
'spread' becomes 'displed' (I can't justify this - if you can you should believe this answer much more).
'out' is an insertion indicator.
'indeed' becomes 'ay' ('ay' and 'aye' can mean yes).
'displed' enclosing 'ay' is 'DISPLAYED'.
'to be' is the link.
Can you help me to learn more?
(Other definitions for displayed that I've seen before include "Exhibited" , "Showed" , "revealed" , "Shown publicly" , "show" .)