Eccentric rues eating bagel and French bread (5)
I believe the answer is:
euros
'french bread' is the definition.
(I've seen this in another clue)
'eccentric rues eating bagel' is the wordplay.
'eccentric' indicates an anagram.
'eating' indicates putting letters inside.
'bagel' becomes 'O' (bagel can mean a score of zero in tennis).
'rues' is an anagram of 'eurs'.
'eurs' placed around 'o' is 'EUROS'.
'and' acts as a link.
(Other definitions for euros that I've seen before include "Monetary units" , "Rouse (anag.)" , "Continental coins" , "money" , "EU currency" .)