The most common and most likely answer to this crossword clue is the 10 letter word DALMATIANS
I've seen this crossword clue in The Daily Telegraph
D
A
L
M
A
T
I
A
N
S
More clues leading to the result DALMATIANS
Buddy explains!

The straight part
We know that "Types spotted at Crufts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case types spotted at crufts = dalmatians.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 DALMATIANS mean?
DALMATIANS noun- One of a breed of dog with a short, white coat with dark spots.
- (demonym) A native or inhabitant of Dalmatia.