New orchestra with considerable drawing power (9)
I believe the answer is:
carthorse
'considerable drawing power' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'new orchestra' is the wordplay.
'new' is an anagram indicator.
'orchestra' with letters rearranged gives 'CARTHORSE'.
'with' is the link.
Can you help me to learn more?
(Other definitions for carthorse that I've seen before include "has pulling power" , "Equine" , "large drawer" , "Beast of burden" .)