In touring Uruguay, you need a guide or leader (4)
I believe the answer is:
guru
'leader' is the definition.
(I know that guru is a type of leader)
'in touring uruguay you' is the wordplay.
'in' says the answer is hidden in the clue.
'GURU' is hidden within 'touring uruguay you'.
'need a guide or' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for guru that I've seen before include "Master, mentor" , "Spiritual guide" , "Hindu or Buddhist spiritual teacher" , "Hindu sage" , "Authoritative source" .)