Wednesday evening's little man? (9)

I believe the answer is:

weeknight

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'wednesday evening's little man?' is the definition.
I can't tell whether this definition defines the answer.

'little man?' is the wordplay.
'little' becomes 'wee' (similar in meaning).
'man?' becomes 'knight' (man can mean a piece in chess).
'wee'+'knight'='WEEKNIGHT'

Can you help me to learn more?

(Other definitions for weeknight that I've seen before include "Saturday evening is not" , "appears between working days" , "Friday even, for example" , "will be wanting an early bedtime then?" , "End of working day" .)

I've seen this clue in The Independent.

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