Awkward throw returned by another (6)
I believe the answer is:
bolshy
'awkward' is the definition.
(I've seen this before)
'throw returned by another' is the wordplay.
'throw' becomes 'lob' (lobbing is a kind of throwing).
'returned' says the letters should be written backwards.
'by another' becomes 'shy' (I can't explain this - if you can you should believe this answer much more).
'lob' back-to-front is 'bol'.
'bol'+'shy'='BOLSHY'
Can you help me to learn more?
(Other definitions for bolshy that I've seen before include "Deliberately combative" , "stroppy" , "Awkward" .)