Finish off puzzle with bad clue, somehow open to improvement (8)
I believe the answer is:
educable
'open to improvement' is the definition.
I can't tell whether this definition defines the answer.
'finish off puzzle with bad clue somehow' is the wordplay.
'finish off' indicates one should take the final letters (I've seen 'finishing off' mean this).
'with' is a charade indicator (letters next to each other).
'somehow' indicates anagramming the letters.
The last letter of 'puzzle' is 'e'.
'bad'+'clue'='badclue'
'badclue' is an anagram of 'ducable'.
'e'+'ducable'='EDUCABLE'
Can you help me to learn more?
(Other definitions for educable that I've seen before include "can take in information" , "Capable of being taught" , "as good students should be" , "Able to be trained" .)