Rodent that's a bit of a drag out in South America (6)
I believe the answer is:
agouti
'rodent' is the definition.
(agouti is a kind of rodent)
'a bit of a drag out in south america' is the wordplay.
'AGOUTI' is hidden in amongst the letters.
But, I am not sure how this is indicated.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for agouti that I've seen before include "Creature" , "Large rodent" , "S. American burrowing rodent" , "Burrowing rodent - IOU tag (anag)" , "Long-legged rabbit-sized rodent on Central and South America" .)