Turns red at this moment, to one’s surprise (6)

I believe the answer is:

wonder

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'one's surprise' is the definition.
'wonder' can be an answer for 'surprise' (thesaurus). I'm not sure about the 'one's' bit.

'turns red at this moment' is the wordplay.
'turns' says the letters should be written backwards.
'at this moment' becomes 'now' (I've seen this before).
'red'+'now'='rednow'
'rednow' in reverse letter order is 'WONDER'.

'to' is the link.

Can you help me to learn more?

(Other definitions for wonder that I've seen before include "Marvel or question" , "Transmitted; despatched" , "Ponder" , "Marvellous person; feel doubt" , "Scene of Alice's adventures" .)

I've seen this clue in the Evening Standard.

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