The most common and most likely answer to this crossword clue is the 11 letter word NUTCRACKERS
I've seen this crossword clue in The Guardian
N
U
T
C
R
A
C
K
E
R
S
Buddy explains!

The straight part
We know that "seasonal food accessories?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case seasonal food accessories? = nutcrackers.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 NUTCRACKERS mean?
NUTCRACKERS noun- An implement for cracking nuts.
- Either of two birds of the genus Nucifraga in the crow family.
- A bootleg mixed drink made from a blend of alcohols and fruit juices.