It means little when we finish late (3)
I believe the answer is:
wee
'it means little' is the definition.
The definition suggests a singular noun which matches the answer.
'we finish late' is the wordplay.
'finish' indicates one should take the final letters.
The last letter of 'late' is 'e'.
'we'+'e'='WEE'
'when' is the link.
Can you help me to learn more?
(Other definitions for wee that I've seen before include "Tiny (Scot)" , "Jimmy" , "Small, like Willy Winkie" , "Little or tiny in Scotland" , "It's small in Scotland" .)