"Don't freak out" (6)

I think it could be either:

Which length description are you looking for?:

4,4

becalm

(Other definitions for becalm that I've seen before include "Make quiet or still - that's an order?" , "Leave (sailing ship) unable to move" , "Take the wind out of ones sails" , "Keep motionless by lack of wind" , "Leave a sailing vessel unable to move for lack of wind" .)

I've seen this clue in the LA Times.

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