The most common and most likely answer to this crossword clue is the 6 letter word EMBRYO
I've seen this crossword clue in The Times
E
M
B
R
Y
O
More clues leading to the result EMBRYO
- What could be the beginning, or be my undoing.
- The writer recalled year in care of relative as starting-point
- All clothing for baby one mother prepared for unborn child
- Upsetting Julius, brother covers up unknown future niece or nephew
- Rudimentary state annihilated by Rome
- Possible result of congress organised by Rome
- Doctor in emergency room calling for attention, seeing germ
- Sometimes the result of an accident; more by design
- Without me member, lost way, ultimately, love – and that’s just the beginning
- This could be the beginning, or be my undoing
Buddy explains!

The straight part
We know that "starting-point" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case starting-point = embryo.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 EMBRYO mean?
EMBRYO noun- In the reproductive cycle, the stage after the fertilization of the egg that precedes the development into a fetus.
- An organism in the earlier stages of development before it emerges from the egg, or before metamorphosis.
- In viviparous animals, the young animal's earliest stages in the mother's body
- In humans, usually the cell growth up to the end of the seventh week in the mother's body
- A rudimentary plant contained in the seed.
- The beginning; the first stage of anything.