Crossword Genius

Beast of a vehicle I bought, 50 per cent off (7)

Ross

I believe the answer is:

caribou

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

'beast' is the definition.

'of a vehicle i bought 50 per cent off' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is located in the answer.
'a' is within the answer.
'i' is found in the answer.
'cent' could be 'c' and 'c' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for caribou that I've seen before include "N. American reindeer" , "Creature" , "North American reindeer" , "Large North American deer" , "Reindeer of North America" .)

I've seen this clue in The Sunday Times and The Times.
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