Notice youth working toys with probe (6,3)

I believe the answer is:

poster boy

'notice youth' is the definition.
(boy putting up posters or notices)

'working toys with probe' is the wordplay.
'working' indicates anagramming the letters.
'with' says to put letters next to each other.
'toys' after 'probe' is 'probetoys'.
'probetoys' is an anagram of 'POSTER BOY'.

(Another definition for poster boy that I've seen is " model".)

I've seen this clue in The Times.

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