The most common and most likely answer to this crossword clue is the 10 letter word NEWFANGLED
I've seen this crossword clue in The Daily Telegraph
N
E
W
F
A
N
G
L
E
D
More clues leading to the result NEWFANGLED
- Few ordered in England originally, being ostentatiously modern!
- Modern points fitted at first at a slant
- Ostentatiously modern novel sought indirectly to embrace the onset of fascism
- Three-quarters canine drew to latest fashion
- Modern mobile few in England ordered
- Latest requirement to protect tooth during walk, oddly
- What emerged after teething troubles perhaps was in vanguard of the ultramodern
- Excessively modern England few regulated
- Miss, concealing weight and tooth length, is not dated at all!
- Ultramodern directions on tooth by the French dentist initiated
Buddy explains!

The straight part
We know that "Latest" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case latest = newfangled.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 NEWFANGLED mean?
NEWFANGLED adjective- (usually derogatory or humorous) Modern, unfamiliar, or different.