Airman bombing harbour (6)
I believe the answer is:
marina
'harbour' is the definition.
(marina is a type of harbour)
'airman bombing' is the wordplay.
'bombing' is an anagram indicator.
'airman' is an anagram of 'MARINA'.
(Other definitions for marina that I've seen before include "Yacht harbour" , "boating facility" , "Place for mooring boats" , "Berthing area for yachts" , "Dock for pleasure craft" .)