Instructions for fixed price given by European (6)
I believe the answer is:
recipe
'instructions' is the definition.
(I've seen this before)
'fixed price given by european' is the wordplay.
'fixed' is an anagram indicator.
'given by' means one lot of letters go next to another.
'european' becomes 'e' (abbreviation e.g. EU).
'price' is an anagram of 'recip'.
'recip'+'e'='RECIPE'
'for' is the link.
(Other definitions for recipe that I've seen before include "Instructions on how to cook" , "Cooking prescription" , "A baking formula" , "Pierce (anag) - directions" , "Set of instructions for preparing a dish" .)