Crossword Genius

"Watch your head!" (4)

Ross

I think it could be either:

mind

duck
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'watch' is the definition.
(I know that mind is a kind of the watch)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for mind that I've seen before include "Take care of; intellect" , "Consciousness" , "This can be made up" , "remember" , "Look after" .)

I've seen this clue in the Evening Standard, the L.A. Times Daily and the Newsday.
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