The most common and most likely answer to this crossword clue is the 9 letter word GREETINGS
I've seen this crossword clue in The Daily Telegraph
G
R
E
E
T
I
N
G
S
Buddy explains!
The straight part
We know that "you’ll get these for Christmas" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case you’ll get these for christmas = greetings.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 GREETINGS mean?
GREETINGS noun- A conventional phrase used to start a letter or conversation or otherwise to acknowledge a person's arrival or presence.
- The action of the verb to greet.
- (sometimes formal, sometimes humorous) hello