Crossword Genius

African tree in Zimbabwean capital, but not the outskirts (4)

Ross

I believe the answer is:

arar

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

'african tree' is the definition.
'arar' can be an answer for 'tree' (I've seen this before). I'm not certain of the 'african' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for arar that I've seen is " Moroccan tree".)

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