Old Peruvian showing where the baked beans are? (5)
I believe the answer is:
This clue is a double definition.
'old peruvian' is the first definition.
(I've seen this in another clue)
'where the baked beans are?' is the second definition.
(baked beans might be in a can)
'showing' acts as a link.
(Other definitions for incan that I've seen before include "Relating to ancient South Americans" , "like former S American civilisation" , "Pachacuti for example" , "Relating to pre-conquest Peruvians" , "Relating to a pre-conquest people of Peru" .)