Orchestra finally directs adopting C scales (7)
I believe the answer is:
ascends
'scales' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their -s form.
Maybe you can see a link between them that I can't see?
'orchestra finally directs adopting c' is the wordplay.
'finally' says to take the final letters.
'directs' becomes 'sends' ('send' can be a synonym of 'direct').
'adopting' means one lot of letters goes inside another (inserted letters are taken on or adopted).
The final letter of 'orchestra' is 'a'.
'sends' enclosing 'c' is 'scends'.
'a'+'scends'='ASCENDS'
Can you help me to learn more?
(Other definitions for ascends that I've seen before include "Rises" , "Travels upwards" , "Moves upwards" , "Climbs, mounts" .)