Flighty types tend to have to pay for these outrageous acts (8)

I believe the answer is:

excesses

I'm a little stuck... Click here to teach me more about this clue!

'outrageous acts' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for excesses that I've seen before include "they're sometimes included in insurance policies" , "Floods" , "Outrageous acts" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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