Crossword Genius

Counterpart stupidly bit me on purpose (8,6)

Ross

I believe the answer is:

opposite number

'counterpart' is the definition.
(synonyms)

'stupidly bit me on purpose' is the wordplay.
'stupidly' is an anagram indicator (a stupid ordering of the letters).
'bit'+'me'+'on'+'purpose'='bitmeonpurpose'
'bitmeonpurpose' anagrammed gives 'OPPOSITE NUMBER'.

(Other definitions for opposite number that I've seen before include "Counterpart" , "Direct competitor" , "One of similar status" , "pal!" , "colleague elsewhere" .)

I've seen this clue in The Telegraph.
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