Poor but happy couple curses in anger (5-4)
I believe the answer is:
third-rate
'poor' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for third-rate that I've seen before include "Very inferior in quality - count down" , "Very inferior in quality, using ordinal number" , "Very inderior in quality - do a count" , "Of very poor quality" , "Very inferior in numerical way" .)