The most common and most likely answer to this crossword clue is the 6 letter word MARMOT
I've seen this crossword clue in The Daily Telegraph
M
A
R
M
O
T
More clues leading to the result MARMOT
- Two males on the ascent to see Alpine animal
- Rodent damage returning to motorway
- Rodent, second seen in store
- . Limb inserted into upset male animal
- Two males mounting Alpine animal
- Large squirrel, second seen in market
- Small animal doctor in market
- Rodent, second seen in trade centre
- Animal doctor tense after sheep rejected
- Rodent, second to appear in bazaar
Buddy explains!

The straight part
We know that "Animal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case animal = marmot.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 MARMOT mean?
MARMOT noun- Any of several large ground-dwelling rodents of the genera Marmota and Cynomys in the squirrel family.