LAX departure missing parts (6)

I believe the answer is:

remiss

'lax' is the definition.
(I've seen this in another clue)

'departure missing parts' is the wordplay.
'parts' indicates a hidden word (part of the clue provides the answer).
'REMISS' is hidden in the letters of 'departure missing'.

(Other definitions for remiss that I've seen before include "Not taking care" , "Failing in what duty requires" , "Careless and inattentive" , "Negligent in performing duties" , "Wrong" .)

I've seen this clue in the Sydney Morning Herald.

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