AA named us in error time after time (2,7)
I believe the answer is:
ad nauseam
'aa named us in error time after time' is the definition.
I can't tell whether this definition defines the answer.
'aa named us in error' is the wordplay.
'in error' indicates anagramming the letters.
'aa'+'named'+'us'='aanamedus'
'aanamedus' anagrammed gives 'AD NAUSEAM'.
Can you help me to learn more?
(Other definitions for ad nauseam that I've seen before include "to an excessive extent" , "Repeating" , "Done so often that it becomes tiresome" , "Past the stage of enjoying" , "Excessively, to a sickening extent" .)