Making unique version of spiral neon sign, omitting one name (13)

I believe the answer is:

personalising

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'making unique version' is the definition.
I can't judge whether this definition defines the answer.

'of spiral neon sign omitting one name' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'omitting' indicates named letters should be taken away.
'one name' becomes 'n' (common abbreviation e.g. on forms).
'spiral'+'neon'+'sign'='spiralneonsign'
'spiralneonsign' with 'n' removed is 'spiraleonsign'.
'spiraleonsign' is an anagram of 'PERSONALISING'.

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I've seen this clue in The Guardian.

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