Twitter, I tell you, is shoddy (5)
I believe the answer is:
cheap
'is shoddy' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for cheap that I've seen before include "Inexpensive or tasteless" , "Mean" , "Shoddy" , "Budget -cheesy" , "Contemptible" .)