It's just one thing after another (4)
I believe the answer is:
list
'it's just one thing after another' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for list that I've seen before include "Slope, slant, lean" , "band > record" , "Italian port" , "Of ship, lean to one side" , "Items or names written or printed consecutively" .)