Banker welcoming European's guide to life? (6)
I believe the answer is:
genome
'guide to life?' is the definition.
I can't tell whether this defines the answer.
'banker welcoming european's' is the wordplay.
'banker' becomes 'gnome' (gnome can informally mean a powerful banker).
'welcoming' is an insertion indicator (in sense of 'inviting in').
'european' becomes 'E' (abbreviation e.g. EU).
'gnome' going around 'e' is 'GENOME'.
Can you help me to learn more?
(Other definitions for genome that I've seen before include "Complete set of genetic material in the cell of an organism" , "blueprint for life" , "instructions for body-building" , "Full chromosome set" , "is the making of you" .)