The most common and most likely answer to this crossword clue is the 8 letter word PLATELET
I've seen this crossword clue in Financial Times
P
L
A
T
E
L
E
T
More clues leading to the result PLATELET
- Allowed to go after HR trophy? It’s in the blood!
- Bloody little thing behind fifty favourite dresses
- Armour sectionthat’s essential for a clot
- Cell is helping to get the go-ahead
- Small amount of claret in goblet, wiping mouth after serving?
- Cell with domesticated animal recently having lost tail inside
- Cell with plaque on lease
- Shattered pallette showing a trace of blood
- Food will hinder its presence in the blood
- Left in the head, block this coagulant
Buddy explains!

The straight part
We know that "Cell" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cell = platelet.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 PLATELET mean?
PLATELET noun- A small colorless disk-shaped particle found in the blood of mammals, which plays an important role in the formation of blood clots.