The most common and most likely answer to this crossword clue is the 6 letter word CRATER
I've seen this crossword clue in The Times
C
R
A
T
E
R
More clues leading to the result CRATER
- Site of impact of old plane beside river
- Result of bombing run by old plane
- Large hole right at side of case
- Huge hole right behind box
- Old vehicle beginning to rust in pit
- Lunar feature cold? Very much not hot
- Provide refreshment? It's right to fill this hole!
- Runs inside to provide food in a bowl
- Breadwinner finally comes in to provide food bowl
- Credit checks estimate evidence of impact
Buddy explains!

The straight part
We know that "Lunar feature" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lunar feature = crater.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 CRATER mean?
CRATER noun- A hemispherical pit created by the impact of a meteorite or other object.
- The basin-like opening or mouth of a volcano, through which the chief eruption comes; similarly, the mouth of a geyser, about which a cone of silica is often built up.
- The pit left by the explosion of a mine or bomb.
- (by extension) Any large, roughly circular depression or hole.
- To form craters in a surface (of a planet or moon).
- To collapse catastrophically; to become devastated or completely destroyed.
- To crash or fall.
- An ancient Greek vessel for mixing water and wine.
- A living being; an animal or (sometimes derogatory) a human.
- A created thing, whether animate or inanimate; a creation.
- A being subservient to or dependent upon another.