Crossword Genius

To have fun with this, you need to start young (3)

Ross

I believe the answer is:

toy

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'to have fun with this' is the definition.
The definition suggests a singular noun which matches the answer.

'to start young' is the wordplay.
'start' suggests taking the first letters.
The first letter of 'young' is 'y'.
'to'+'y'='TOY'

'you need' acts as a link.

Can you help me to learn more?

(Other definitions for toy that I've seen before include "One of spelt out words" , "Miniature (dog)" , "Trifle or dally with" , "Small breed" , "Child's amusement" .)

I've seen this clue in the Evening Standard.
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