Crossword Genius

Escape routes for airliners? (6,5)


I believe the answer is:

flight paths

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'airliners?' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.

'escape routes' is the wordplay.
'escape' becomes 'flight' (synonyms).
'routes' becomes 'paths' ('path' can be a synonym of 'route').
'flight'+'paths'='FLIGHT PATHS'

'for' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.
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