The most common and most likely answer to this crossword clue is the 6 letter word GOITRE
I've seen this crossword clue in The Times
G
O
I
T
R
E
More clues leading to the result GOITRE
- Act in dashing way on getting swelling
- It’s wound around swelling
- Gland’s smelling – it’s coated in blood
- Find it surrounded by blood — get a lump in the throat
- It’s surrounded by blood, swelling
- Got on swallowing iodine, which will cure this
- Growth occurring in thyroid, rarely enlarged initially
- Find it surrounded by blood and get a lump in the throat
- Swelling, blood goes round it
- . Complaint — it's in blood
Buddy explains!

The straight part
We know that "swelling" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case swelling = goitre.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 GOITRE mean?
GOITRE noun- An enlargement of the front and sides of the neck caused by inflammation of the thyroid gland.