The most common and most likely answer to this crossword clue is the 8 letter word BILLOWED
I've seen this crossword clue in The Times
B
I
L
L
O
W
E
D
More clues leading to the result BILLOWED
- Had a blow-out, account unpaid
- Dollar maybe, outstanding, surged
- William, third in sports day, is puffed out
- Boy sounded in pain, as went like the wind?
- Ben’s partner was in debt and showed signs of inflation
- Rose up, stooped and sick, to enter
- Caught the wind, sick and bent over
- Filled out, invoice outstanding
Buddy explains!

The straight part
We know that "surged" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case surged = billowed.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 BILLOWED mean?
BILLOWED verb- To surge or roll in billows.
- To swell out or bulge.