The most common and most likely answer to this crossword clue is the 9 letter word SOCIOPATH
I've seen this crossword clue in The Guardian
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More clues leading to the result SOCIOPATH
Buddy explains!

The straight part
We know that "Unsympathetic type" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unsympathetic type = sociopath.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 SOCIOPATH mean?
SOCIOPATH noun- A person with an antisocial personality disorder, exhibiting antisocial behavior that usually is the result of social and environmental factors in the person's early life.