The most common and most likely answer to this crossword clue is the 4 plus 4 letter word WELL DONE
I've seen this crossword clue in Financial Times
W
E
L
L
D
O
N
E
More clues leading to the result WELL DONE
- Our lot'll visit Tyneside thoroughly prepared
- Think about demoting Germany and Spain – bravo
- Good work by spring bee with last of winter gone
- Finished digging? My congratulations!
- Pat on the back far from rare?
- Renovation of old newel is carried out successfully
- Words of commendation by no means rare
- Far from rare words of praise
- Congratulations certainly not rare!
- How steak may be good for you
Buddy explains!

The straight part
We know that "bravo" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bravo = well done.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 WELL DONE mean?
WELL DONE adjective- (of meat etc) Cooked until no blood runs and there is no pink flesh on the inside.