Fare that's wrong in books troubles publisher (6,4)

'fare' is the definition.
(oxtail soup is a kind of food)

'wrong in books troubles publisher' is the wordplay.
'wrong' becomes 'x' (X is used to mark something as incorrect).
'in' is an insertion indicator.
'books' becomes 'OT' (abbreviation for Old Testament).
'troubles' becomes 'ails' (as verb).
'publisher' becomes 'OUP' (abbreviation for Oxford University Press).
'x' placed within 'ot' is 'oxt'.
'oxt'+'ails'+'oup'='OXTAIL SOUP'

'that's' is the link.