Crossword Genius

What the foreigner wanting airmail stationery asked for? (8)

Ross

I believe the answer is:

flypaper

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'for?' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for flypaper that I've seen before include "for hanging being used for killing" , "Sticky strip that catches small insects" , "Sticky trap for bluebottles etc" , "Bluebottle catcher" , "one collecting insects" .)

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