The most common and most likely answer to this crossword clue is the 4 letter word WOMB
I've seen this crossword clue in The Times
W
O
M
B
More clues leading to the result WOMB
- Finally blow into warm club providing cosy environment
- First home or last home? What’s first, not what’s last
- Flash car carrying nothing back to incubator
- Jonathan Ross, say, talking of space where people start
- Mammal not at place of origin
- What’s vital for childbirth without doctor
- Native Australian loses at home before being dropped
Buddy explains!

The straight part
We know that "What’s vital for childbirth" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what’s vital for childbirth = womb.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 WOMB mean?
WOMB noun- In female mammals, the organ in which the young are conceived and grow until birth; the uterus.
- The abdomen or stomach.
- The stomach of a person or creature.
- A place where something is made or formed.
- Any cavity containing and enveloping anything.
- To enclose in a womb, or as if in a womb; to breed or hold in secret.