Crossword Genius

Get a new vehicle first, then indicate viewing platform (7,5)

Ross

I believe the answer is:

vantage point

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

'viewing platform' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'get a new vehicle first then indicate' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is located in the answer.
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is present in the answer.
'first' could be 'i' (I in Roman numerals eg Elizabeth I) and 'i' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for vantage point that I've seen before include "Position affording a good view" , "Favourable position" , "Place affording a good view" .)

I've seen this clue in The Daily Express.
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