The most common and most likely answer to this crossword clue is the 6 letter word AFRICA
A
F
R
I
C
A
More clues leading to the result AFRICA
- A Carmelite, possibly, not fully crossing cold land mass
- First person caught in a far-off land
- One day California will supply an entire continent
- Very large area of fair dismantled by state
- Here Livingstone found father in main road, car being tailed
- In charge after France occupies areas of the second largest continent
- Caribbean country, discounting cost, securing fine mass of land
- A monk shortly catching cold where it can be very hot
- Travelling fair around great land mass
- Several countries collectively deploy force in republic, ignoring cost
Buddy explains!

The straight part
We know that "land mass" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case land mass = africa.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.