To do this, be a member of a coven (7)
I believe the answer is:
bewitch
'to do' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'be a member of a coven' is the wordplay.
'a member of a coven' becomes 'witch' (I can't explain this - if you can you should believe this answer much more).
'be'+'witch'='BEWITCH'
'this' acts as a link.
Can you help me to learn more?
(Other definitions for bewitch that I've seen before include "Captivate" , "Put under a spell, or delight" , "Spellbind" , "Cast a spell upon" , "Put under a magic spell, or charm" .)