Half taper could produce landing lights (5,4)
I believe the answer is:
flare path
'landing lights' is the definition.
(a flare path lights the way for a plane)
'half taper could produce' is the wordplay.
'could produce' indicates anagramming the letters (I've seen this in other clues).
'half'+'taper'='halftaper'
'halftaper' anagrammed gives 'FLARE-PATH'.
(Other definitions for flare path that I've seen before include "illuminated airstrip" , "Lights on landing" .)