The most common and most likely answer to this crossword clue is the 6 letter word HEATED
H
E
A
T
E
D
More clues leading to the result HEATED
- Angry journalist under pressure
- Core competency raised — leader embraces it, excited
- Was unfaithful, losing head when passionate
- Passionate earl in dance of death
- Fiery editor sat on by police in America
- Angry boss must accept vacant type
- The cat fed, missing starters, becoming angry
- Angry leader retaining only half of team
- Loathed embracing sweetheart with passion
- Explosive dissolved before detonator’s top fired
Buddy explains!

The straight part
We know that "Vehement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vehement = heated.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 HEATED mean?
HEATED verb- To cause an increase in temperature of (an object or space); to cause to become hot (often with "up").
- To become hotter.
- To excite or make hot by action or emotion; to make feverish.
- To excite ardour in; to rouse to action; to excite to excess; to inflame, as the passions.
- To arouse, to excite (sexually).
- Very agitated, angry or impassioned.
- (usually not comparable) Made warm or hot by some means.