Country in South America having little hesitation getting control of system (9)
I believe the answer is:
superuser
'control of system' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'country in south america having little hesitation' is the wordplay.
'country in south' becomes 'super' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'america' becomes 'US' (United States).
'having' says to put letters next to each other.
'little hesitation' becomes 'er' (expression of hesitation).
'super'+'us'+'er'='SUPERUSER'
'getting' is the link.
Can you help me to learn more?
(Another definition for superuser that I've seen is " Computer administrator".)