The most common and most likely answer to this crossword clue is the 8 letter word NESTLING
I've seen this crossword clue in The Times
N
E
S
T
L
I
N
G
More clues leading to the result NESTLING
- Young bird stuck at first in trap on heather
- Chick dressed in finest lingerie
- Young bird in web disturbed by small fish
- Earnest linguists keeping in a huddle
- Listening out after releasing one small bird
- Young bird settling snugly
- A young bird, linnet’s flying gets good
- Silent cuckoo covered by wings of neighbouring chick
- Immature tit perhaps taking up comfortable position
- Listen to rock, no good being unable to leave home
Buddy explains!

The straight part
We know that "in a huddle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case in a huddle = nestling.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 NESTLING mean?
NESTLING noun- A small, young bird that is still confined to the nest.
- A nest; a receptacle.
- To settle oneself comfortably and snugly.
- To press oneself against another affectionately.
- To lie half-hidden or in shelter.
- To build or sit upon a nest.
- Of a bird: to look after its young.
- To move or place into a comfortable position
- The act of one who nestles.