Crossword Genius

Manufacture prototype one's seen on runway? (7,5)

Ross

I believe the answer is:

fashion model

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

'one's seen on runway?' is the definition.
I can't judge whether this defines the answer.

'manufacture prototype' is the wordplay.
'manufacture' becomes 'fashion' (I can't explain this - if you can you should believe this answer much more).
'prototype' becomes 'model' (I've seen this in another clue).
'fashion'+'model'='FASHION MODEL'

Can you help me to learn more?

(Another definition for fashion model that I've seen is " Catwalk mannequin".)

I've seen this clue in The Guardian.
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