Crossword Genius

80s car range (6)

Ross

I believe the answer is:

sierra

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This might be a double definition.

'80s car' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'range' is the second definition.
(sierra is a kind of range)

Can you help me to learn more?

(Other definitions for sierra that I've seen before include "Jagged mountains - code word for S" , "- - Leone" , "Comms code S" , "Mountain chain, S (radio comms.)" , "International codeword" .)

I've seen this clue in The Independent.
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