Accountant heads for Uruguay, Columbia and America from political meeting (6)
I believe the answer is:
caucus
'political meeting' is the definition.
(I've seen this before)
'accountant heads for uruguay columbia and america' is the wordplay.
'accountant' becomes 'ca' (abbreviation for chartered accountant).
'heads for' suggests taking the first letters (I've seen 'head for' mean this).
'and' is a charade indicator (letters next to each other).
'america' becomes 'us' (abbreviation for the United States).
The first letters of 'uruguay columbia' is 'uc'.
'ca'+'uc'+'us'='CAUCUS'
'from' acts as a link.
(Other definitions for caucus that I've seen before include "Political gathering to select a candidate, US-style" , "Group with shared concerns within a political party" , "Small, dominant political group" , "Small group of like-minded politicians" , "Small group in political party making plans, policies etc" .)