Once's follower (4)
I believe the answer is:
upon
(Other definitions for upon that I've seen before include "Lying on top of" , "voucher, business stopped" , "Au courant" , "At a prescribed point in time" , "Supported by (a surface)" .)
I believe the answer is:
upon
(Other definitions for upon that I've seen before include "Lying on top of" , "voucher, business stopped" , "Au courant" , "At a prescribed point in time" , "Supported by (a surface)" .)