With 4 Down, hand wave

• See 19- and 54-Across and 11- and 41-Down
• It's "such sweet sorrow"
• Sweet sorrow, to some
• Discontinue an association or relation

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Parting \Par"ting\ (p[aum]rt"[i^]ng), a. [From Part , v.] Serving to part; dividing; separating. Given when departing; as, a parting shot; a parting salute. ``Give him that parting kiss.'' --Shak. Departing. ``Speed the parting guest.'' ...

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
I. noun COLLOCATIONS FROM OTHER ENTRIES a parting gift (= a gift that you give someone when you leave/say goodbye ) ▪ She brought him a parting gift. EXAMPLES FROM OTHER ENTRIES ▪ the parting of clouds EXAMPLES FROM CORPUS ▪ I owe it to Victoria to lend ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"action of going away," c.1300, verbal noun from part (v.). As "separation of persons," early 14c.

Wikipedia Word definitions in Wikipedia
Parting may refer to: Parting.com , funeral home directory Parting tradition Cleavage (crystal)#Parting Won "PartinG" Lee-sak , professional StarCraft II player