The most common and most likely answer to this crossword clue is the 9 letter word ICELANDIC
I've seen this crossword clue in The Times
I
C
E
L
A
N
D
I
C
More clues leading to the result ICELANDIC
- ... remarkable indelicacy almost in another
- National firm once caught importing large antelope
- Old Norse style originally discovered between 1100 and 1100
- One caught in deal worried by cold language
- Irritated initially about candle I ordered from a certain country
- Cecil and I chewed cold tongue
- Chip found on both sides of an antelope of a Nordic country
- Twice in charge of protecting antelope — one belonging to Scandinavia
- Cecil and I used foreign language
Buddy explains!
The straight part
We know that "National" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case national = icelandic.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.