The most common and most likely answer to this crossword clue is the 6 plus 2 plus 2 letter word MOTHER TO BE
I've seen this crossword clue in Independent
M
O
T
H
E
R
T
O
B
E
Buddy explains!
The straight part
We know that "woman pregnant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case woman pregnant = mother to be.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 MOTHER TO BE mean?
MOTHER TO BE noun- A pregnant woman, especially one expecting her first child.
- A woman whose partner is pregnant.