Sell paired designs for single shoe (10)

I believe the answer is:

espadrille

I'm a little stuck... Click here to teach me more about this clue!

'single shoe' is the definition.
'espadrille' can be an answer for 'shoe' (espadrille is a kind of shoe). I'm not sure about the 'single' bit.

'sell paired designs' is the wordplay.
'designs' is an anagram indicator (I've seen 'design' mean this).
'sell'+'paired'='sellpaired'
'sellpaired' anagrammed gives 'ESPADRILLE'.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for espadrille that I've seen before include "Light rope-soled shoe" , "sandal!" , "Shoe with a canvas upper" , "Cord-soled shoe" , "Footwear" .)

I've seen this clue in the Sydney Morning Herald.

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