Tell me, using your brain, best sock (3,4,2)
I believe the answer is:
out with it
'tell me' is the definition.
(I've seen this before)
'your brain best sock' is the wordplay.
I cannot really understand how this works, but
'brain' could be 'wit' (synonyms) and 'wit' is present in the answer.
'sock' could be 'hit' (I've seen this in another clue) and 'hit' is found in the answer.
The remaining letters 'out' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'using' acts as a link.
Can you help me to learn more?
(Other definitions for out with it that I've seen before include "Speak up" , "Say what you think" , "Go on" , "Tell me quickly" , "Demand for comment" .)