US airport weak on security? (3)

I believe the answer is:

lax

I believe this clue is a double definition.

'us airport' is the first definition.
(Los Angeles International Airport)

'weak on security?' is the second definition.
(lax can mean slack or careless)

(Other definitions for lax that I've seen before include "Not strict or conscientious" , "Slapdash" , "Flabby" , "Not sufficiently strict" , "Casual" .)

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app