The most common and most likely answer to this crossword clue is the 6 letter word PATINA
I've seen this crossword clue in The Guardian
P
A
T
I
N
A
More clues leading to the result PATINA
- Paint applied with a glossy coat
- Quiet girl taking in a film
- Pet wearing a coat
- Dad keeps ignoring Mr Martin Sheen
- “State ain’t budging!” – Sheen
- Light touch shown by popular Australian getting sheen
- Role not right in Australian film
- Light touch shown by popular Australian in film
- Daddy gets girl a fine coat
- Film‘s iconic opening set in an Indian city
Buddy explains!

The straight part
We know that "fine coat /fine coat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fine coat /fine coat = patina.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 PATINA mean?
PATINA noun- A paten, flat type of dish
- The colour or incrustation which age and wear give to (mainly metallic) objects; especially, the green rust which covers works of art such as ancient bronzes, coins and medals.
- A green colour, tinted with grey, like that of bronze patina.
- A gloss or superficial layer.
- Of a green colour, tinted with grey, like that of bronze patina.