Adjacent bed is changing direction (6)
I believe the answer is:
beside
'adjacent' is the definition.
(I've seen this before)
'bed is changing direction' is the wordplay.
'changing' indicates anagramming the letters.
'direction' becomes 'e' (E is an example).
'bed'+'is'='bedis'
'bedis' with letters rearranged gives 'besid'.
'besid'+'e'='BESIDE'
(Other definitions for beside that I've seen before include "Very near to" , "Neighbours" , "- - the point" , "Adjacent to" , "Next door to" .)