The most common and most likely answer to this crossword clue is the 7 plus 3 plus 10 letter word LOADING THE DISHWASHER
I've seen this crossword clue in The Guardian
L
O
A
D
I
N
G
T
H
E
D
I
S
H
W
A
S
H
E
R
Buddy explains!
The straight part
We know that "chore" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chore = loading the dishwasher.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.