Crossword Genius

Total number turning round exhausted (5)

Ross

I believe the answer is:

inall

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'turning round exhausted' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'total number' is the wordplay.
'total' becomes 'inal' (I can't justify this - if you can you should believe this answer much more).
'number' becomes 'L' (L is an example).
'inal'+'l'='INALL'

Can you help me to learn more?

(Another definition for inall that I've seen is " everything counted".)

I've seen this clue in The Irish Times.
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