The most common and most likely answer to this crossword clue is the 6 letter word TARTAR
T
A
R
T
A
R
More clues leading to the result TARTAR
- Seaman repeatedly seen as fearsome person
- Unpleasant sort of sailor snatching paintings
- Fierce woman seeing sailor repeatedly
- Double dose of salt for old invader
- . Two renegades heading north, one from central Asia
- Jack repeated calculus
- What’s used to pay twice for dental coverage?
- Hard deposit of two salts
- Someone feared two strike-breakers turning up
- Sailor repeatedly sees fierce person
Buddy explains!

The straight part
We know that "one’s intimidating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one’s intimidating = tartar.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 TARTAR mean?
TARTAR noun- A red compound deposited during wine making; mostly potassium hydrogen tartrate - a source of cream of tartar.
- A hard yellow deposit on the teeth.
- A fearsome or angrily violent person.