Drug with no name? Charlie is daring (6)
I believe the answer is:
heroic
'is daring' is the definition.
(thesaurus)
'drug with no name? charlie' is the wordplay.
'drug' becomes 'H' (H is an example).
'with' means one lot of letters goes inside another.
'no' becomes 'o' (resembles 0 - 'no' can mean 'zero').
'name? charlie' becomes 'eric' (I can't explain this - if you can you should give a lot more credence to this answer).
'o' going inside 'eric' is 'eroic'.
'h'+'eroic'='HEROIC'
Can you help me to learn more?
(Other definitions for heroic that I've seen before include "larger than life" , "Undaunted" , "Extravagant" , "Valiant, courageous" , "Surpassing the ordinary, in courage say" .)