The most common and most likely answer to this crossword clue is the 3 letter word RAW
I've seen this crossword clue in The Daily Telegraph
R
A
W
More clues leading to the result RAW
- Crude sketch, not the first
- Bloody freezing
- Fighting back? It might be bloody
- Natural conflict after uprising
- Naked when depicted by artist ignoring limits
- Frank can be unjust, unrefined, ignorant and cold
- Revolutionary conflict not refined
- Unprepared in mounting armed conflict
- Particularly sensitive due to return of hostilities
- Piercing scream on the radio
Buddy explains!

The straight part
We know that "Particularly sensitive" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case particularly sensitive = raw.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 RAW mean?
RAW noun- (sugar refining, sugar trade) An unprocessed sugar; a batch of such.
- A galled place; an inveterate sore.
- (by extension) A point about which a person is particularly sensitive.
- A recording or rip of a show that has not been fansubbed.
- A scan that has not been cleaned (purged of blemishes arising from the scanning process) and has not been scanlated.
- (of food) Not cooked.
- (of materials, products, etc.) Not treated or processed; in a natural state, unrefined, unprocessed.
- Having had the skin removed or abraded; chafed, tender; exposed, lacerated.
- New or inexperienced.
- Crude in quality; rough, uneven, unsophisticated.
- (of data) Uncorrected, without analysis.
- (of weather) Unpleasantly cold or damp.
- (of an emotion, personality, etc.) Unmasked, undisguised, strongly expressed
- Candid in a representation of unpleasant facts, conditions, etc.
- (of language) Unrefined, crude, or insensitive, especially with reference to sexual matters
- Not covered; bare; bald.
- Without a condom.