The most common and most likely answer to this crossword clue is the 11 letter word LATITUDINAL
I've seen this crossword clue in The Times
L
A
T
I
T
U
D
I
N
A
L
Buddy explains!
The straight part
We know that "around the Arctic Circle, say?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case around the arctic circle, say? = latitudinal.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 LATITUDINAL mean?
LATITUDINAL adjective- Relating to latitude.