Europeans blame top guide (4,4)
I believe the answer is:
pole star
'guide' is the definition.
(I've seen this before)
'europeans blame top' is the wordplay.
'europeans' becomes 'poles' (Pole is an example).
'blame top' becomes 'tar' (I am not sure about this - if you are sure you should believe this answer much more).
'poles'+'tar'='POLE STAR'
Can you help me to learn more?
(Other definitions for pole star that I've seen before include "7 has pointers to it" , "Point in the night sky sought by navigators" , "It's the brightest one in Ursa Minor" , "Part of the Little Bear" , "Polaris" .)