Inferior articles given a farewell (2-2)
I believe the answer is:
ta ta
'farewell' is the definition.
(I've seen this before)
'inferior articles given a' is the wordplay.
'inferior articles' becomes 'tat' (I've seen this before).
'given' means one lot of letters go next to another.
'tat'+'a'='TA-TA'
(Other definitions for ta ta that I've seen before include "Remark of farewell or thanks" , "Bye!" , "So long!" , "Goodbye (colloq.)" , "Bye-bye" .)