Extravert with special expenses (9)
I believe the answer is:
outgoings
'expenses' is the definition.
(I've seen this before)
'extravert with special' is the wordplay.
I cannot really see how this works, but
'special' could be 's' (common abbreviation as in Special Air Service) and 's' is present in the answer.
The remaining letters 'outgoing' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for outgoings that I've seen before include "expeditions" , "Regular expenditure" , "Expenses" .)