Fare provided by a blind date arranged outside church (8,4)

'fare' is the definition.
(balanced diet is a kind of fare)

'a blind date arranged outside church' is the wordplay.
'arranged' indicates anagramming the letters.
'outside' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'a'+'blind'+'date'='ablinddate'
'ablinddate' anagrammed gives 'balanddiet'.
'balanddiet' enclosing 'ce' is 'BALANCED DIET'.

'provided by' acts as a link.