A single time only (4)
I believe the answer is:
once
(Other definitions for once that I've seen before include "Cone (anag.)" , "Singly" , "At a previous time" , "On a single (or past) occasion" , "in bygone days" .)
I believe the answer is:
once
(Other definitions for once that I've seen before include "Cone (anag.)" , "Singly" , "At a previous time" , "On a single (or past) occasion" , "in bygone days" .)