Alliance building? Not quite (4)
I believe the answer is:
bloc
'alliance' is the definition.
(I know that bloc is a type of alliance)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for bloc that I've seen before include "Group whose members have common objectives" , "Alliance - coalition" , "Nations grouped for a purpose" , "A number of countries" , "united nations" .)