The most common and most likely answer to this crossword clue is the 11 letter word CHEESEBOARD
I've seen this crossword clue in The Times
C
H
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More clues leading to the result CHEESEBOARD
Buddy explains!

The straight part
We know that "On which knives may be drawn in both Lancashire and Yorkshire?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case on which knives may be drawn in both lancashire and yorkshire? = cheeseboard.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 CHEESEBOARD mean?
CHEESEBOARD noun- A board used for serving cheeses.