The most common and most likely answer to this crossword clue is the 8 letter word SPECIFIC
I've seen this crossword clue in The Guardian
S
P
E
C
I
F
I
C
More clues leading to the result SPECIFIC
- Particular fictional genre about to secure record turnover
- Particular rampant mushroom in sci-fi production
- Particular muscle providing parts thus
- Fixed up porcini provided in Corsica, originally
- Particular spice with cooking starts to flavour Indian curry
- Particular sci-fi production featuring The Rise Of Porcino
- Mixed spice rejected, if head chef is particular
- Particular word mentioned with gravity by scientists
- Precise remedy
- This heat is clearly defined
Buddy explains!

The straight part
We know that "particular" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case particular = specific.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 SPECIFIC mean?
SPECIFIC noun- A distinguishing attribute or quality.
- A remedy for a specific disease or condition.
- Specification
- (in the plural) The details; particulars.
- Explicit or definite
- Pertaining to a species.
- Pertaining to a taxon at the rank of species
- Special, distinctive or unique
- Intended for, or applying to, a particular thing
- Serving to identify a particular thing (often a disease or condition), with little risk of mistaking something else for it.
- Being a remedy for a particular disease
- Limited to a particular antibody or antigen
- Of a value divided by mass (e.g. specific orbital energy)
- Similarly referring to a value divided by any measure which acts to standardize it (e.g. thrust specific fuel consumption, referring to fuel consumption divided by thrust)
- A measure compared with a standard reference value by division, to produce a ratio without unit or dimension (e.g. specific refractive index is a pure number, and is relative to that of air)