Provide surety for member on stumps (4)
I believe the answer is:
bail
'provide' is the definition.
The definition and answer can be both to do with ownership as well as being verbs in their base form.
Perhaps you can see a link between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for bail that I've seen before include "Cross piece on wicket" , "Temporary release of one awaiting trial" , "Piece placed on top of cricket stumps" , "Conditional release" , "Piece of sporting apparatus" .)