Like the numerals used in necromancy (5)

I believe the answer is:

roman

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

'like the numerals' is the definition.
I can't judge whether this defines the answer.

'in necromancy' is the wordplay.
'in' indicates a hidden word.
'ROMAN' is hidden within 'necromancy'.

'used' is the link.

Can you help me to learn more?

(Other definitions for roman that I've seen before include "Norma (anag) -- upright style of print" , "Dominant political power of first centuries AD" , "Sort of face" , "Upright form of type" , "Type of candle, nose etc" .)

I've seen this clue in the Evening Standard.

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