Fugitive Garda finally found in part of airport (7)
I believe the answer is:
runaway
'fugitive' is the definition.
(I know that fugitive can be written as runaway)
'garda finally found in part of airport' is the wordplay.
'finally' suggests the final letters.
'found in' means one lot of letters goes inside another.
'part of airport' becomes 'runway'.
The last letter of 'garda' is 'a'.
'a' put inside 'runway' is 'RUNAWAY'.
(Other definitions for runaway that I've seen before include "Fugitive" , "such a success?" , "desert" , "scooter?" , "One who has taken flight" .)