The most common and most likely answer to this crossword clue is the 5 letter word PICOT
I've seen this crossword clue in The Guardian
P
I
C
O
T
More clues leading to the result PICOT
- Company invested in mine that’s a feature of Honiton?
- Northerner once holding old twist of thread
- Ornament ancient Briton carries round
- Very good bed's embroidered decoration
- Piece of embroidery -- officer breaking mine
- Choose detailed books on decorative embroidery
- Fancy topic: Embroidery Stitch
- Ornamental loop, topic for knitting
- Hole through which threaded firm loop
- Ornamental loop: special topic
Buddy explains!

The straight part
We know that "Embroidery Stitch" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case embroidery stitch = picot.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 PICOT mean?
PICOT noun- An embroidery trim made of a series of small loops.