Christopher Robin initially in spotted cloak (6)
I believe the answer is:
screen
'cloak' is the definition.
(I've seen this before)
'christopher robin initially in spotted' is the wordplay.
'initially' suggests taking the first letters.
'in' is an insertion indicator.
'spotted' becomes 'seen' (spot can mean to see or notice).
The initial letters of 'christopher robin' is 'cr'.
'cr' going into 'seen' is 'SCREEN'.
(Other definitions for screen that I've seen before include "Set of foldable hinged panels" , "A film is projected onto it" , "Protect - project" , "Show pictures on the surface" , "Test or examine for the presence of disease or infection" .)