The most common and most likely answer to this crossword clue is the 8 letter word FEROCITY
I've seen this crossword clue in The Daily Telegraph
F
E
R
O
C
I
T
Y
More clues leading to the result FEROCITY
- Savagery of attack outside centre recalled, years later
- Wildness of female erotic dancing ending in orgy
- Centre back in attack last to display violence
- Ruthlessness of central element returning to bolster number losing heart
- Instilling love to rectify awful savagery
- Some paralytic or effectively keeled over showing savagery
- Vehemence over sports official repelled by Manchester team?
- Trio roaming around front of cattery restricted by whimsical behaviour of tigers?
- Set fire to colony evacuated in violence
Buddy explains!

The straight part
We know that "Vehemence" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vehemence = ferocity.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 FEROCITY mean?
FEROCITY noun- The condition of being ferocious.