Army officer designed air bridge (9)
I believe the answer is:
brigadier
'army officer' is the definition.
(I've seen this before)
'designed air bridge' is the wordplay.
'designed' indicates an anagram (designed with the letters).
'air'+'bridge'='airbridge'
'airbridge' anagrammed gives 'BRIGADIER'.
(Other definitions for brigadier that I've seen before include "Military leader" , "Army rank" , "High-ranking army officer" , "Air bridge over to the military officer" , "Officer in charge of army unit, part of division" .)