European bidders wasted chicken feed (8)
I believe the answer is:
birdseed
'chicken feed' is the definition.
'birdseed' can be an answer for 'feed' (birdseed is a kind of feed). I'm not certain of the 'chicken' bit.
'european bidders wasted' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'wasted' indicates an anagram.
'e'+'bidders'='ebidders'
'ebidders' is an anagram of 'BIRDSEED'.
Can you help me to learn more?
(Other definitions for birdseed that I've seen before include "eg Hemp" , "Food for a tweeter - dries bed (anag)" , "Food scattered for budgies etc" .)