Dope is somehow composed (6)
I believe the answer is:
poised
'composed' is the definition.
(similar in meaning)
'dope is somehow' is the wordplay.
'somehow' indicates anagramming the letters.
'dope'+'is'='dopeis'
'dopeis' anagrammed gives 'POISED'.
(Other definitions for poised that I've seen before include "Balanced or self-confident" , "Ready for action or self-assured" , "Showing self-assurance" , "Graceful" , "Elegant, self assured" .)