Still good advice to the excited (6)

I believe the answer is:

becalm

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

I don't understand the rest of the clue.

(Other definitions for becalm that I've seen before include "Mabel C (anag.)" , "Leave (sailing ship) unable to move" , "Make quiet or still - sounds like an order" , "Take the wind out of ones sails" , "Make quiet or still - that's an order?" .)

I've seen this clue in The Guardian and The Globe and Mail.

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