The most common and most likely answer to this crossword clue is the 5 letter word REIMS
I've seen this crossword clue in The Guardian
R
E
I
M
S
More clues leading to the result REIMS
- Surrender accepted here, many papers reported
- Borders crossing close to notable French city
- Miser, drunk, in Champagne city
- Poor miser in French city
- Wretched miser in French city
- Head off armies rampaging in French city
- Boundaries around European city
- Starts to recall eagerly in Maidenhead, splendid bubbly place
- In Singapore, I’m searching for a source of fizz
Buddy explains!
The straight part
We know that "a source of fizz" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a source of fizz = reims.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.