Unusual anaesthetic - seven, for example (3,6)

I believe the answer is:

odd number

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'seven for example' is the definition.
I know nothing about this answer so I can't tell whether this works.

'unusual anaesthetic' is the wordplay.
'unusual' becomes 'odd' (similar in meaning).
'anaesthetic' becomes 'number' (i.e. something that makes things numb).
'odd'+'number'='ODD NUMBER'

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(Another definition for odd number that I've seen is " 2017, say".)

I've seen this clue in the Sydney Morning Herald.

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