The most common and most likely answer to this crossword clue is the 6 letter word INTUIT
I've seen this crossword clue in The Times
I
N
T
U
I
T
More clues leading to the result INTUIT
- Just know Eskimos will have little time inside
- Know instinctively dweller in the far north retains temperature
- Divine language includes an extra tense
- Divine right finally beaten by northerners
- Know instinctively that Eskimo has time for new replacement
- Arctic resident maintaining temperature — that makes sense
- One Night in Paristakes time to comprehend
- Sign tourists often lack sense...
- Get the picture of one wearing funky miniskirt
- Have a hunch about northern native taking fourth place in Iditarod
Buddy explains!

The straight part
We know that "Know instinctively" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case know instinctively = intuit.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 INTUIT mean?
INTUIT verb- To know intuitively or by immediate perception.