The most common and most likely answer to this crossword clue is the 5 letter word SHINE
I've seen this crossword clue in Financial Times
S
H
I
N
E
More clues leading to the result SHINE
- Show some flashiness?
- Do exceptionally well in cutting a Victorian adventure novel
- Film buff
- Polish joint of beef brought to Spain
- Polish function that hotel puts on
- Quiet! I need half the light
- Quiet pioneer disregarding odds to perform well
- Stand out, showing a measure of pushiness
- Fancy wax
- Polish, Hebrew and French letters
Buddy explains!

The straight part
We know that "Polish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case polish = shine.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 SHINE mean?
SHINE noun- Brightness from a source of light.
- Brightness from reflected light.
- Excellence in quality or appearance; splendour.
- Shoeshine.
- Sunshine.
- Moonshine; illicitly brewed alcoholic drink.
- The amount of shininess on a cricket ball, or on each side of the ball.
- A liking for a person; a fancy.
- A caper; an antic; a row.
- To emit light.
- To reflect light.
- To distinguish oneself; to excel.
- To be effulgent in splendour or beauty.
- To be eminent, conspicuous, or distinguished; to exhibit brilliant intellectual powers.
- To be immediately apparent.
- To create light with (a flashlight, lamp, torch, or similar).
- To cause to shine, as a light.
- To make bright; to cause to shine by reflected light.
- To cause (something) to shine; put a shine on (something); polish (something).
- To polish a cricket ball using saliva and one’s clothing.