Minder has tea with old South American president (8)
I believe the answer is:
chaperon
'minder' is the definition.
(I've seen this before)
'tea with old south american president' is the wordplay.
'tea' becomes 'cha' (cha is a type of tea).
'with old south american president' becomes 'peron' (I can't explain this - if you can you should believe this answer much more).
'cha'+'peron'='CHAPERON'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for chaperon that I've seen before include "Attendant" , "Car-phone (anag.)" , "Accompany and look after" , "Preach on about older woman in charge of girl" , "Woman supervising girl" .)