Spanish chap has a replacement for European guidebook (6)
I believe the answer is:
manual
'guidebook' is the definition.
(thesaurus)
'spanish chap has a' is the wordplay.
'spanish' becomes 'mu' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'chap' becomes 'Al' (man's name).
'has' means one lot of letters goes inside another.
'a' becomes 'an'.
'mu'+'al'='mual'
'mual' going around 'an' is 'MANUAL'.
'replacement for european' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for manual that I've seen before include "reference book" , "Book; done by hand" , "Working with the hands" , "Instruction book prepared by hand?" , "Guide" .)