Farther away over there in bed (6)
I believe the answer is:
beyond
'farther' is the definition.
(synonyms)
'over there in bed' is the wordplay.
'over there' becomes 'yon' (archaic word meaning 'over there').
'in' is an insertion indicator.
'yon' put inside 'bed' is 'BEYOND'.
'away' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for beyond that I've seen before include "On the farther side - in addition" , "Farther than or outside" , "Past" , "unknown" , "On the far side of" .)