Goods thrown out from planes in the morning (6)

I believe the answer is:

jetsam

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'goods thrown out' is the definition.
I can't tell whether this definition defines the answer.

'planes in the morning' is the wordplay.
'planes' becomes 'jets' (jet is a kind of plane).
'in the morning' becomes 'am'.
'jets'+'am'='JETSAM'

'from' is the link.

Can you help me to learn more?

(Other definitions for jetsam that I've seen before include "Ship's discharge" , "Cargo cast overboard" , "Discarded rubbish" , "Goods from ship washed ashore" , "found at sea" .)

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

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