Being inexperienced, you get some things wrong (8)
I believe the answer is:
youngish
'some things wrong' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?
'being inexperienced you' is the wordplay.
'being inexperienced' becomes 'young' (I've seen this before).
'you' becomes 'ish' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'young'+'ish'='YOUNGISH'
'get' is the link.
Can you help me to learn more?
(Other definitions for youngish that I've seen before include "Rather immature" , "Not very old" , "Fairly youthful" .)