He has a project for an airport (8)
I believe the answer is:
heathrow
'for an airport' is the definition.
(London airport)
'he has a project' is the wordplay.
'has' is a charade indicator (letters next to each other).
'project' becomes 'throw' (synonyms).
'he'+'a'+'throw'='HEATHROW'
(Other definitions for heathrow that I've seen before include "London's main airport" , "London airport" , "site for airport" , "London's busiest airport" , "our counterpart of Charles de Gaulle" .)