The most common and most likely answer to this crossword clue is the 6 letter word ENZYME
E
N
Z
Y
M
E
More clues leading to the result ENZYME
- Enemy managed to capture unknown catalyst
- Unknown enemy dispersing: that can bring a reaction
- Food processor from Yemen, unfortunately with unknown content
- Enemy foolishly seizes unknown catalyst
- In frenzy, men get a form of protein
- Delirium dropping French compiler’s catalyst
- Enemy Zulu leader going rounds causing ferment
- In a frenzy, melted protein
- Limits to Eastern Zymology and Medicine? It can start something
- Enemy failing to take west of zone is a catalyst
Buddy explains!

The straight part
We know that "a form of protein" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a form of protein = enzyme.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 ENZYME mean?
ENZYME noun- A globular protein that catalyses a biological chemical reaction.
- Leavened bread, as opposed to azyme