The most common and most likely answer to this crossword clue is the 13 letter word INTRANSIGENCE
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result INTRANSIGENCE
- Very absent-minded, perhaps, badly singe butts in failure to move?
- Pigheadedness a sign in recent changes
- Ancient singer’s awkward lack of flexibility
- At sea, certain ensign displays stubbornness
- Obstinacy namely involves terribly stern caning
- Obstinacy recanting sin about embracing sweetheart
- Lack of accommodation? Possibly renting, in case
- Refusal to compromise, Irene can’t sign anyway
- Obstinacy creates innings constructed without modicum of style
Buddy explains!

The straight part
We know that "Obstinacy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case obstinacy = intransigence.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 INTRANSIGENCE mean?
INTRANSIGENCE noun- Unwillingness to change one's views or to agree.