Concerned with bungled back-ordering surpassing usual limits (6-8)
I believe the answer is:
record-breaking
'concerned with bungled back-ordering surpassing usual limits' is the definition.
I can't judge whether this definition defines the answer.
'concerned with bungled back-ordering' is the wordplay.
'concerned with' becomes 're' (re can mean regarding, concerning).
'bungled' indicates an anagram.
'back'+'ordering'='backordering'
'backordering' anagrammed gives 'cordbreaking'.
're'+'cordbreaking'='RECORD-BREAKING'
Can you help me to learn more?
(Other definitions for record-breaking that I've seen before include "Surpassing previous maximum achievement" , "setting a new standard" .)