The most common and most likely answer to this crossword clue is the 5 letter word TESTA
I've seen this crossword clue in Financial Times
T
E
S
T
A
More clues leading to the result TESTA
- Special seat around back of court providing cover for a seed
- Try on a coat
- Report of person checking Pip's coat?
- Dip one’s toe in a seed coat
- Coverage of seed trial, part one?
- Article on big game put in hard cover
- Protective covering set up by volunteers
- Hard shell of some invertebrate starfish
- Analysis by leading attorney in hard case
Buddy explains!

The straight part
We know that "seed coat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case seed coat = testa.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 TESTA mean?
TESTA noun- A seed coat.
- The external calciferous shell, or endoskeleton, of an echinoderm; the test.