Crossword Genius

Miles can give a wry one (5)

Ross

I believe the answer is:

smile

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

'a wry one' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'miles can' is the wordplay.
'can' is an anagram indicator (I've seen 'canned' mean this (canned can mean drunk)).
'miles' with letters rearranged gives 'SMILE'.

'give' acts as a link.

Can you help me to learn more?

(Other definitions for smile that I've seen before include "Facial expression showing pleasure" , "Show happiness" , "Friendly facial gesture" , "Happy facial expression" , "express pleasure" .)

I've seen this clue in the Evening Standard.
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