Crossword Genius

Wolf you flee from (4)

Ross

I believe the answer is:

bolt

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'wolf' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for bolt that I've seen before include "Short arrow for a crossbow" , "Eat hurriedly" , "Run away suddenly; long fixing pin" , "Fastener; suddenly run away" , "Run away; fasten (door)" .)

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