Went down (9)
(Other definitions for slid that I've seen before include "Moved smoothly along a surface" , "Moved (eg, on ice)" , "Slipped" , "Skidded, slewed" .)
'went down' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sunk that I've seen before include "Sent to bed" , "Dropped; in a fix" , "ruined" , "Gone under" , "Doomed - bored" .)
'went down' is the definition.
(sinking is a kind of going down)
This is the entire clue.
(Other definitions for sank that I've seen before include "Subsided" , "(Of ship) went down" , "Foundered" , "Fell to the bottom" , "Scuttled" .)
'went down' is the definition.
('descend' can be a synonym of 'go down')
This is all the clue.
(Other definitions for descended that I've seen before include "went downhill?" , "Came down" .)