Crossword Genius

Spiny tree (6)

Ross

I believe the answer is:

acacia

(Other definitions for acacia that I've seen before include "Wattle genus" , "Type of shrub or tree" , "Plant like wattle" , "Garden shrub, also known as wattle" , "Shrub of warm climates" .)

I've seen this clue in the King Feature Syndicate and The Independent.
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