Keep your mind on coin in the container (11)
I believe the answer is:
concentrate
'keep your mind' is the definition.
I can't tell whether this defines the answer.
'on coin in the container' is the wordplay.
'coin' becomes 'cent' (cent is a kind of coin).
'in the' indicates putting letters inside.
'container' becomes 'crate' (crate is a kind of container).
'on'+'cent'='oncent'
'oncent' going inside 'crate' is 'CONCENTRATE'.
Can you help me to learn more?
(Other definitions for concentrate that I've seen before include "Focus - attend carefully" , "juice, perhaps" , "get solution in chemistry" , "What thinker may have to do" , "Don't daydream!" .)