Crossword Genius

Trained person needs to write the template (9)

Ross

I believe the answer is:

prototype

I'm a little stuck... Click here to teach me more about this clue!

'template' is the definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'trained person needs to write' is the wordplay.
'trained person' becomes 'pro' (pro is a kind of person. I am not sure about the 'trained' bit.).
'needs' is a charade indicator (letters next to each other).
'write' becomes 'type' (typing is a kind of writing).
'pro'+'to'+'type'='PROTOTYPE'

'the' acts as a link.

Can you help me to learn more?

(Other definitions for prototype that I've seen before include "First version (of a device) built for development" , "Example for testing" , "Preliminary build; mock-up" , "First full-scale working model" , "Preliminary version from which other forms may be developed" .)

I've seen this clue in the Sydney Morning Herald.
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