Inside airport allowing access (6)

I believe the answer is:

portal

'access' is the definition.
(I know that portal is a type of entrance)

'inside airport allowing' is the wordplay.
'inside' indicates a hidden word.
'PORTAL' can be found hidden inside 'airport allowing'.

(Other definitions for portal that I've seen before include "An imposing gate or doorway" , "An imposing gateway" , "Grand and imposing entrance" , "Grand sort of entrance." , "An imposing door or gate" .)

I've seen this clue in The Mirror.

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