Little man, might it be Wednesday evening? (9)
I believe the answer is:
weeknight
'it be wednesday evening?' is the definition.
The definition suggests a singular noun which matches 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'
'might' acts as a link.
Can you help me to learn more?
(Other definitions for weeknight that I've seen before include "Part of 67 [SENNIGHT]" , "Friday even, for example" , "End of working day" , "will be wanting an early bedtime then?" , "Saturday evening is not" .)