For all time (11)
(Other definitions for permanently that I've seen before include "For good" , "So as to last forever" , "Always" .)
'for all time' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ever that I've seen before include "On any occasion" , "Continuously" , "Veer away endlessly" , "To the end of time" , "Continually" .)