Stays for seminar that's been arranged (7)
I believe the answer is:
remains
'stays' is the definition.
(I know this)
'seminar that's been arranged' is the wordplay.
'that's been arranged' indicates anagramming the letters.
'seminar' with letters rearranged gives 'REMAINS'.
'for' acts as a link.
(Other definitions for remains that I've seen before include "Leftovers" , "Remnants" , "Residue" , "Stays behind" , "Corpse; relics" .)