Like a rare gas carried in container transport (5)

I believe the answer is:

inert

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'like a rare gas' is the definition.
I can't judge whether this defines the answer.

'carried in container transport' is the wordplay.
'carried' indicates the answer is hidden within the clue.
'INERT' is hidden within 'in container transport'.

Can you help me to learn more?

(Other definitions for inert that I've seen before include "Disinclined to act" , "Devoid of motion or change" , "lazy" , "Lacking vigour, inactive" , "like neon" .)

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

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