Sailor and editor tucked up for sleep? (4)

I believe the answer is:
abed
'tucked up for sleep?' is the definition.
'abed' can be an answer for 'sleep?' (I've seen this before). I am not sure about the 'tucked up for' bit.
'sailor and editor' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'and' means one lot of letters go next to another.
'editor' becomes 'ed' (abbreviation).
'ab'+'ed'='ABED'
Can you help me to learn more?
(Other definitions for abed that I've seen before include "in a comfortable position" , "dream location?" , "in retirement, possibly?" , "laid up" , "how we all hope to go?" .)
