Crossword Genius

Fund a couple of aerial manoeuvres (8)

Ross

I believe the answer is:

bankroll

'fund' is the definition.
(I know that bankroll is a type of fund)

'a couple of aerial manoeuvres' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is found within the answer.
'of' could be 'o' and 'o' is found in the answer.
This explanation may well be incorrect...

(Other definitions for bankroll that I've seen before include "keep afloat?" , "Provide finance for" , "Fund" .)

I've seen this clue in The Times.
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