Begin to wince (5)

I believe the answer is:

start

I believe this is a double definition.

'begin' is the first definition.
(I know that begin can be written as start)

'wince' is the second definition.
(thesaurus)

'to' acts as a link.

(Other definitions for start that I've seen before include "Set in motion" , "Onset" , "get under way" , "Origin" , "Jump suddenly" .)

I've seen this clue in The Irish Independent.

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