The most common and most likely answer to this crossword clue is the 6 letter word SALUKI
I've seen this crossword clue in The Daily Telegraph
S
A
L
U
K
I
More clues leading to the result SALUKI
- Hound satirical writer penning piece central to column
- Dog/small pup Keir going walkies every now and again
- British ousting American sausage dog
- Southern Britain introduced to boxer dog
- British, rather than American, sausage dog
- Our Friend from Asia‘s ‘unmistakable’? Mix it up with bat, men do
- Dog set sail around UK!
- Primate stealing heart of valued dog
- Pet I ask nervously about a game, skipping do
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 = saluki.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.