Go into solution (8)
I believe the answer is:
dissolve
'go into solution' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dissolve that I've seen before include "Become liquid, melt" , "Deliquesce" , "(Cause to) liquefy or vanish" , "Loves Sid (anag)" , "In terms of crying, start" .)