landing strips (7)
I believe the answer is:
runways
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">landing strips</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for runways that I've seen before include "Airport zones" , "See model on these" , "Take-off strips for planes" , "Landing-strips for planes" , "Aircraft landing strips" .)