Fine line shown in proposal for one making late arrival on the square? (9)
I believe the answer is:
tailender
'one making late arrival on the square?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'fine line shown in proposal for' is the wordplay.
'fine' becomes 'ai' (resembles At, informal term for top quality).
'line' becomes 'l' (used when specifying particular lines from a poem).
'shown in' means one lot of letters goes inside another.
'proposal for' becomes 'tender' (I am not sure about this - if you are sure you should believe this answer much more).
'ai'+'l'='ail'
'ail' going inside 'tender' is 'TAILENDER'.
Can you help me to learn more?
(Other definitions for tailender that I've seen before include "one of the last to come in" , "Rabbit" .)