The most common and most likely answer to this crossword clue is the 5 letter word CORGI
C
O
R
G
I
More clues leading to the result CORGI
- Canine tooth one has right in middle
- Dog carried back by big rocket
- Expression of surprise over soldier’s dog
- Bit of gear I hung around head of Ronnie Barker?
- My soldier’s a favourite of the queen, perhaps
- Dog, company ultimately for soldier
- Dog collars on rectors getting itchy, originally
- Gracious! US private gets dog!
- Fellow soldier holding head of rifleman's dog
- Commanding officer right get soldier a dog
Buddy explains!

The straight part
We know that "dog" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dog = corgi.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 CORGI mean?
CORGI noun- A dog of a breed having a small body, short legs and fox-like features.