The most common and most likely answer to this crossword clue is the 10 letter word INGLENOOKS
I've seen this crossword clue in The Guardian
I
N
G
L
E
N
O
O
K
S
Buddy explains!

The straight part
We know that "chimney corners" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chimney corners = inglenooks.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 INGLENOOKS mean?
INGLENOOKS noun- A nook or corner beside an open fireplace; a chimney corner.