Starts to worry over not getting any money (5)

I believe the answer is:

wonga

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'money' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'starts to worry over not getting any' is the wordplay.
'starts to' indicates taking the first letters.
The initial letters of 'worry over not getting any' is 'WONGA'.

Can you help me to learn more?

(Other definitions for wonga that I've seen before include "Cash" , "bread" , "Money (informal)" , "Dosh (informal)" , "Spondulicks (slang)" .)

I've seen this clue in The Irish Times.

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