Swollen account was due payment (8)

I believe the answer is:

billowed

'swollen account was due payment' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for billowed that I've seen before include "Swollen account was due payment" , "was swelling" , "Flowed with an undulating motion; filled with air" .)

I've seen this clue in The Telegraph.

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