The most common and most likely answer to this crossword clue is the 10 letter word INTIMIDATE
I've seen this crossword clue in The Times
I
N
T
I
M
I
D
A
T
E
More clues leading to the result INTIMIDATE
- Scare makes close friend conceal identity
- I had to feed friendly cow
- Cow's close, suppressing instinctive urges
- Linda occasionally gets in close to cow
- Bully gets personal after I’d left
- Put fear into friend holding papers
- Threaten papers in secret
- Allude to touring Idaho for cow
- One disease initially harboured by friendly cow
- In private I finally milked cow
Buddy explains!

The straight part
We know that "cow" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cow = intimidate.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 INTIMIDATE mean?
INTIMIDATE verb- To make timid or afraid; to cause to feel fear or nervousness; to deter, especially by threats of violence