Crossword Genius

Also coming through is a terrible darn storm (7)

Ross

I believe the answer is:

tornado

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

'storm' is the definition.
(tornado is a kind of storm)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for tornado that I've seen before include "Cyclone, twister" , "Violent whirlwind over land" , "Road not turned in the windstorm" , "Severe wind" , "Terrible current" .)

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