Free tooth prominent up front (2,3,4)

I believe the answer is:

to the fore

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'front' is the definition.
(thesaurus)

'free tooth prominent up' is the wordplay.
'free tooth' anagrams to 'TO THE FORE'.
But, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for to the fore that I've seen before include "In a leading position" , "Prominent" , "Conspicuous, up in front (2.3.4)" .)

I've seen this clue in The Irish Independent.

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