Hi again.
SPRING looks a very reasonable answer for 7d so, assuming that the other letters you have for 12a are correct then, at least, VALEDICTORY fits.
I'm not clear about the wordplay though. 'val' & 'edict' could equate to 'valid' & 'notice' in the clue, but that would leave 'ory'.
So I'm puzzled. I hope someone else can sort this out for you.
JimC