Smart worker after unfinished poem (7)
I believe the answer is:
elegant
'smart' is the definition.
(similar in meaning)
'worker after unfinished poem' is the wordplay.
'worker' becomes 'ant' (worker is a type of ant).
'after' is a charade indicator (letters next to each other).
'unfinished poem' becomes 'eleg' (I am not sure about this - if you are sure you should believe this answer much more).
'ant' put after 'eleg' is 'ELEGANT'.
Can you help me to learn more?
(Other definitions for elegant that I've seen before include "Refined gracefulness" , "Neat leg? (anag)" , "Well-dressed" , "Debonair, stylishly dressed" , "Stylish in appearance, a gentle kind" .)