Lear’s beginning to enter stage and I’m keeping close to you – powerful stuff (9)
I believe the answer is:
plutonium
'close to you powerful stuff' is the definition.
I can't judge whether this definition defines the answer.
'lear's beginning to enter stage and i'm' is the wordplay.
'beginning to' suggests taking the first letters.
'enter' means one lot of letters goes inside another.
'stage' becomes 'put on' (as in putting on a show).
'and' says to put letters next to each other.
'i'm' becomes 'ium' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'lears' is 'l'.
'l' going into 'puton' is 'pluton'.
'pluton'+'ium'='PLUTONIUM'
'keeping' acts as a link.
Can you help me to learn more?
(Other definitions for plutonium that I've seen before include "Nuclear material" , "Radioactive element" , "Fuel for nuclear reactors" , "Radioactive material, Pu" , "sign of this bomb-making material" .)