Bidding not working with European cartel (8)
I believe the answer is:
offering
'bidding' is the definition.
('offer' can be a synonym of 'bid')
'not working with european cartel' is the wordplay.
'not working' becomes 'off' (I've seen this in another clue).
'with' is a charade indicator (letters next to each other).
'european' becomes 'E' (abbreviation e.g. EU).
'cartel' becomes 'ring' (both can mean a criminal group).
'off'+'e'+'ring'='OFFERING'
(Other definitions for offering that I've seen before include "Contribution, sacrifice" , "Gift presented for acceptance" , "Gift or contribution as tendered" , "Oblation" , "Sacrifice to deity" .)