Passing through checkpoint and emerging together (2,6)

I believe the answer is:

in tandem

'together' is the definition.
(working in tandem is working together)

'passing through checkpoint and emerging' is the wordplay.
'passing through' says the answer is hidden in the clue.
'IN TANDEM' can be found hidden inside 'checkpoint and emerging'.

(Other definitions for in tandem that I've seen before include "Together - as on a bicycle made for two" , "Together (as a pair)" , "Working together" , "One behind the other or alongside" , "Manned it as twosome" .)

I've seen this clue in The Independent.

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