Punctually turning into this writer (6)

I believe the answer is:

ontime

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

'turning into this writer' is the wordplay.
'turning' indicates an anagram.
'this writer' becomes 'me' (the person who is writing these clues).
'into' is an anagram of 'onti'.
'onti'+'me'='ONTIME'

Can you help me to learn more?

(Other definitions for ontime that I've seen before include "Sharp" , "Prompt" .)

I've seen this clue in The Daily Express.

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