It's a lever that may be turned to many uses (9)
I believe the answer is:
versatile
'turned to many uses' is the definition.
I can't judge whether this definition defines the answer.
'it's a lever that may be' is the wordplay.
'that may be' indicates anagramming the letters.
'its'+'a'+'lever'='itsalever'
'itsalever' with letters rearranged gives 'VERSATILE'.
Can you help me to learn more?
(Other definitions for versatile that I've seen before include "Multi-talented" , "Good at adapting oneself" , "willing to fit in?" , "Relatives able to do many things" , "Resourceful; relatives (anag.)" .)