The most common and most likely answer to this crossword clue is the 6 letter word DAYBED
D
A
Y
B
E
D
Buddy explains!
The straight part
We know that "CD?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cd? = daybed.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DAYBED mean?
DAYBED noun- A couch that can be used as a sofa by day and a bed by night.
- A long chair for reclining.