The most common and most likely answer to this crossword clue is the 7 letter word NEATEST
I've seen this crossword clue in Independent
N
E
A
T
E
S
T
More clues leading to the result NEATEST
- Most elegant to dine in comfortable home
- Most smart new art consumer?
- Most dexterous action initially in Newcastle match?
- Most elegant farm animal is French
- Most tidy home — worry going inside it
- Dine in residence that’s most immaculate
- Most tidy take food into cosy place
- Bull heads for exit, swerving toreador – that’s most ingenious
- Most orderly home — have food in it
- A teen’s organised before time — most unlike a teen?
Buddy explains!

The straight part
We know that "most immaculate" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case most immaculate = neatest.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 NEATEST mean?
NEATEST adjective- Clean, tidy; free from dirt or impurities.
- Free from contaminants; unadulterated, undiluted. Particularly of liquor and cocktails; see usage below.
- Conditions with a liquid reagent or gas performed with no standard solvent or cosolvent.
- With all deductions or allowances made; net.
- Having a simple elegance or style; clean, trim, tidy, tasteful.
- Well-executed or delivered; clever, skillful, precise.
- Facile; missing complexity or details in the favor of convenience or simplicity.
- Good, excellent, desirable.