Depart from one's craft (7,4)

I believe the answer is:

abandon ship

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'depart' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'one's craft' is the wordplay.
'one's' becomes 'abandon' (I can't justify this - if you can you should give a lot more credence to this answer).
'craft' becomes 'ship' (ship is a kind of craft).
'abandon'+'ship'='ABANDON SHIP'

'from' is the link.

Can you help me to learn more?

(Other definitions for abandon ship that I've seen before include "get into lifeboats" , "Go overboard" , "Leave a sinking vessel" .)

I've seen this clue in The Irish Independent.

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