Crossword Genius

Arab's cash I brought through Paris airport as usual (10)

Ross

I believe the answer is:

ordinarily

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

'as usual' is the definition.
(thesaurus)

'arab's cash i brought through paris airport' is the wordplay.
I cannot really understand how this works, but
'cash' could be 'l' (The pound sterling symbol is an elaborate L) and 'l' is present in the answer.
'i' could be 'a' and 'a' is located in the answer.
'through' could be 'in' and 'in' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ordinarily that I've seen before include "following the custom" , "As a rule" , "In the usual run of things" .)

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