The most common and most likely answer to this crossword clue is the 4 letter word ARCH
I've seen this crossword clue in The Times
A
R
C
H
More clues leading to the result ARCH
- Shot of race horse leading rival
- Principal gateway perhaps
- Bow made of wood, initially pound off
- Wily crook
- Curved structure builder ultimately installed in a church
- Chief, playfully mischievous
- Support walk, heading off …
- Leading parade, miles away
- Support for bridge expert
- Very experienced army walk away from front
Buddy explains!

The straight part
We know that "Bow" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bow = arch.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 ARCH mean?
ARCH noun- An inverted U shape.
- An arch-shaped arrangement of trapezoidal stones, designed to redistribute downward force outward.
- An architectural element having the shape of an arch
- Any place covered by an arch; an archway.
- An arc; a part of a curve.
- A natural arch-shaped opening in a rock mass.
- Curved part of the bottom of a foot.
- To form into an arch shape
- To cover with an arch or arches.
- A chief.
- Knowing, clever, mischievous.
- Principal; primary.